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ID# Date Updated Type Status Sev Version OS CPU Summary
483592009-10-27
19:24
2012-05-18
20:19
MySQL Cluster: Cluster (NDB) storage engineIn progress
(5026 days)
S3mysql-5.1-telco-7.1Linux (RHEL 4)AnyALTER TABLE xx COMMENT - locks large tables
597272011-01-25
21:36
2016-12-04
20:45
MySQL Server: InnoDB storage engineVerifiedS55.1 plugin, 5.5, 5.6AnyAnyLRU search can be inefficient with compression
1143312024-03-12
21:53
2024-03-19
9:48
MySQL Server: InnoDB storage engineVerified
(9 days)
S58.0.*, 8.0.36Linuxx86MySQL get high insert latency in low concurrency
1129022023-10-31
14:39
2024-02-26
11:07
MySQL Server: OptimizerVerified
(31 days)
S58.0.31, 8.0.35Linux (n.a.)x86 (x86_64)Optimizer in MySQL 8 is significantly slower on dependent subqueries than 5.7
1140562024-02-19
23:03
2024-02-22
10:56
MySQL Server: Prepared statementsVerified
(35 days)
S58.0.32, 8.0.22+AnyAnyPerformance degredation using REGEXP in statement with parameters vs query
1107792023-04-24
11:32
2023-05-12
5:49
MySQL Server: OptimizerVerified
(321 days)
S58.0.33, 5.7.42AnyAnyIN clause cause pick bad performan index
1059822021-12-27
8:11
2022-01-03
8:02
MySQL Server: Storage EnginesVerified
(815 days)
S5all, 5.7, 8.0LinuxAnyhard-coded libaio API parameter may not helpful to performance
1046152021-08-13
10:26
2021-08-13
11:36
MySQL Server: LoggingVerified
(958 days)
S58.0Any (rhel7.4)Any (intel-x86)trx commit slow if there are too many binlog files to purge while rotating
1001192020-07-06
7:07
2020-08-14
13:55
MySQL Server: InnoDB storage engineVerified
(1322 days)
S58.0.20AnyARMSwitch to use relaxed memory barrier for redo-log counters
1004322020-08-05
7:55
2020-08-05
14:03
MySQL Server: Performance SchemaVerified
(1331 days)
S58.0.21AnyARMOptimal memory-barrier for performance-schema counter
1000912020-07-02
12:23
2020-07-03
8:48
Connector / PythonVerified
(1364 days)
S58.0.18, 8.0.20AnyAnymysqlx interface is a lot slower than the connector.python interface
994322020-05-04
8:09
2020-05-05
12:04
MySQL Server: InnoDB storage engineVerified
(1424 days)
S58.0.20AnyARMImproving memory barrier during rseg allocation
987712020-02-28
6:29
2020-03-02
18:39
MySQL Server: OptimizerVerified
(1490 days)
S25.7, 5.7.29AnyAnyPerformance impact while selecting data from a JSON type column
950802019-04-23
7:24
2019-04-30
14:09
MySQL RouterVerified
(1794 days)
S58.0.15, 8.0.16Oracle Linux (Oracle Linux Server 7.5, Linux 4.1.12-124.18.6.el7uek.x86_64 )x86 (Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz)MySQL Router consuming mor CPU resources than it should
831512016-09-26
14:27
2021-09-14
10:08
MySQL Server: Connection HandlingVerified
(1891 days)
S25.6.33CentOSAnyhigh number of SHOW WARNINGS can stall server if compressed protocol in use
915852018-07-10
1:16
2018-08-27
11:06
MySQL Server: Stored RoutinesVerified
(2088 days)
S55.7, 8.0, 8.0.11, 5.7.23AnyAny“dead” code inside the stored proc or function can significantly slow it down
744082014-10-15
19:52
2018-07-04
15:16
MySQL Server: InnoDB storage engineVerified
(2094 days)
S55.6, 5.7, 8.0AnyAnysrv_conc_enter_innodb() is not optimal
899262018-03-06
10:20
2018-03-12
12:21
MySQL Server: C API (client library)Verified
(2208 days)
S55.7Linuxx86Performance degradation in libmysqlclient 20
602612011-02-26
0:59
2016-11-12
22:57
MySQL Cluster: Cluster (NDB) storage engineVerified
(2693 days)
S5mysql-cluster-gpl-7.1.9aAnyAnyAre transaction hints needed in these situation?
816302016-05-28
5:46
2016-08-31
6:30
MySQL Server: ReplicationVerified
(2766 days)
S55.7.12AnyAnyMySQL 5.7 is 37-45% slower then 5.6 when using binlogging due to defaults change
813762016-05-11
6:48
2018-07-16
8:12
MySQL Server: InnoDB storage engineVerified
(2877 days)
S55.7AnyAnySingle page flushing should be removed
303422007-08-09
18:52
2015-10-07
14:54
MySQL Server: OptimizerVerified
(3095 days)
S55.0.37, 5.6.17AnyAnyEquality propagation can make optimization much slower
783552015-09-07
15:53
2015-09-15
8:51
MySQL Server: OptimizerVerified
(3117 days)
S55.5.41, 5.5.46, 5.5.47Ubuntu (x64)Anynested select query not work on mysql 5.5 but it works well in mysql 5.6
711402013-12-13
9:16
2015-07-31
8:59
MySQL Server: OptimizerVerified
(3163 days)
S25.1, 5.5, 5.6.15, 5.7.7AnyAnyOptimizer does NOT use range checks in typical self-join for InnoDB tables
759812015-02-20
13:56
2017-11-05
7:12
MySQL Server: InnoDB storage engineVerified
(3276 days)
S55.7.6AnyAnyMySQL 5.7.5 30% slower than 5.6.23 for 1 thread write
759622015-02-19
3:14
2015-03-03
20:46
MySQL Server: InnoDB storage engineVerified
(3313 days)
S35.6.24, 5.7.6AnyAnyInnodb calls fsync when freeing a LRU page to fulfill page request
755042015-01-14
12:52
2015-01-22
14:51
MySQL Server: InnoDB storage engineVerified
(3353 days)
S5AnyAnybtr_search_guess_on_hash makes found block young twice?
643402012-02-15
14:07
2013-06-14
15:35
MySQL Server: InnoDB Plugin storage engineVerified
(3940 days)
S55.1.52, 5.1.61AnyAnyrace on no_flush event during buf_flush_free_margin
691182013-05-02
2:28
2013-05-02
14:00
MySQL Server: Command-line ClientsVerified
(3983 days)
S55.6, 5.7AnyAnyWasted work in method get_table_structure()
685722013-03-05
10:57
2014-02-19
16:19
MySQL Server: Federated storage engineVerified
(4040 days)
S35.5.25a, 5.5.31AnyAnyFEDERATED using SHOW TABLE STATUS causes performance problems for InnoDB tables
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