Fix bug 1660243 (Test rpl.rpl_semi_sync_event is unstable)#1339
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On master, wait for the Rpl_semi_sync_master_clients variable to become zero before attempting semi sync master plugin uninstallation.
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Dec 20, 2023
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Jan 17, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Jan 17, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 12, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 12, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 16, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
VarunNagaraju
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May 31, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
VarunNagaraju
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Jun 5, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
VarunNagaraju
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Jun 10, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
VarunNagaraju
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Jun 12, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
VarunNagaraju
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Jun 12, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Jul 25, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Jul 30, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Aug 21, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Aug 28, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Aug 30, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Sep 23, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Sep 25, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Sep 25, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Oct 17, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Oct 17, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
dlenev
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Oct 22, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Oct 28, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Oct 30, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Nov 11, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Nov 14, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Nov 14, 2024
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Jan 23, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Jan 23, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
lukin-oleksiy
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Jan 27, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Jan 27, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Jan 29, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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Apr 15, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Apr 16, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Apr 16, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
inikep
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Apr 16, 2025
Upstream commit ID: facebook/mysql-5.6@730887a PS-8951: Merge percona-202305 (https://jira.percona.com/browse/PS-8951) Summary: This fixes facebook/mysql-5.6#1336 This adds the my.cnf options: rocksdb_block_cache_numshardbits This option can be set so that RocksDB to fix the number of block cache shards. The default value is -1 to match existing behavior. When -1 RocksDB code will determine the number of block cache shards as min(6, rocksdb_block_cache_size / min_shard_size) and today min_shard_size is 512K for LRU and 32M for Hyper. The math above frequently results in a block cache with too many small shards when rocksdb_block_cache_size is not too big (a few GB is not too big) and there will be perf problems that are hard to debug in such a case. Pull Request resolved: facebook/mysql-5.6#1339 Differential Revision: D47635762 fbshipit-source-id: 7ca759f9a001dbe1a20978ded5b614c209bd5b1f
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On master, wait for the Rpl_semi_sync_master_clients variable to
become zero before attempting semi sync master plugin uninstallation.
http://jenkins.percona.com/job/percona-server-5.6-param/1628/