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ID# Date Updated Type Status Sev Version OS CPU Summary
987712020-02-28
6:29
2020-03-02
18:39
MySQL Server: OptimizerVerified
(1963 days)
S25.7, 5.7.29AnyAnyPerformance impact while selecting data from a JSON type column
831512016-09-26
14:27
2021-09-14
10:08
MySQL Server: Connection HandlingVerified
(2364 days)
S25.6.33CentOSAnyhigh number of SHOW WARNINGS can stall server if compressed protocol in use
595572011-01-17
15:26
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5292 days)
S25.1, 5.5AnyAnyMySQL uses order of fields in GROUP BY when ORDER BY NULL is specified
454242009-06-10
6:58
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5878 days)
S25.0.51a, 5.0.77 and 5.1.34, 5.1, 6.0 bzrLinuxAnyUPDATE statement cause full table scan ?
478842009-10-07
3:24
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5645 days)
S25.1.39, 5.1.44, 5.5.99Linux (Linux web2 2.6.18-92.1.18.el5.028stab060.8 #1 SMP Mon Feb 9 21:44:50 MSK 2009 x86_64)AnyMySQL 5.1.39 failed to use index
569242010-09-22
11:26
2018-06-24
20:45
MySQL Workbench: SQL EditorVerified
(4973 days)
S25.2.28Linux (Ubuntu 10.04)AnyMemory leak? Possibly not a bug.
711402013-12-13
9:16
2015-07-31
8:59
MySQL Server: OptimizerVerified
(3636 days)
S25.1, 5.5, 5.6.15, 5.7.7AnyAnyOptimizer does NOT use range checks in typical self-join for InnoDB tables
219782006-09-01
22:13
2011-02-16
23:43
MySQL Server: OptionsVerified
(6431 days)
S34.0.18, 5.0, 6.0.10, 5.5Windows (Windows 2000)Any'flush_time' value set for 1800 sec. on Non Win9x/Me installs by default
600872011-02-10
13:14
2016-12-04
20:45
MySQL Server: InnoDB storage engineVerified
(5268 days)
S35.5AnyAnyPatch: Minimize InnoDB I/O load by adding a prefetch stage
759622015-02-19
3:14
2015-03-03
20:46
MySQL Server: InnoDB storage engineVerified
(3786 days)
S35.6.24, 5.7.6AnyAnyInnodb calls fsync when freeing a LRU page to fulfill page request
589282010-12-14
20:58
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5326 days)
S35.1-bugteamAnyAny"not exists" optimization not applied if relevant table is not single inner one
580082010-11-05
9:38
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5365 days)
S35.1, 5.0AnyAnywrong datatype (blob) in the resultset if the string is larger than 512 bytes
569652010-09-23
9:22
2015-08-10
14:34
MySQL Server: mysqldump Command-line ClientVerified
(5402 days)
S35.1.44Linux (2.6.18-164.6.1.el5 #1 SMP, CentOS 5.5)Anymysqldump poor performance with large number of tables
483592009-10-27
19:24
2012-05-18
20:19
MySQL Cluster: Cluster (NDB) storage engineIn progress
(5499 days)
S3mysql-5.1-telco-7.1Linux (RHEL 4)AnyALTER TABLE xx COMMENT - locks large tables
466482009-08-11
11:41
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5810 days)
S35.1.32, 4.1, 5.0, 5.1, azalea bzrLinux (2.6.28.7)AnySQL_CALC_FOUND_ROWS kills performance with ORDER BY and LIMIT
274522007-03-26
17:35
2018-09-09
20:45
MySQL Server: OptimizerVerified
(6083 days)
S35.0.40-BK, 5.0.24a-debian-log, 5.1.31-bzr, 6.0.7-alpha, 6.0.9-bzrLinuxAnyCorrelated subquery produces inefficient optimizer plan for INFORMATION_SCHEMA
442012009-04-10
3:04
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5508 days)
S35.1.32, 5.1.35-bzr, 6.0.11-bzr, 5.0, 5.6.99AnyAnyPerformance problem with View
427052009-02-09
16:37
2011-02-16
23:43
MySQL Server: GeneralVerified
(5957 days)
S35.1.30AnyAnyReduce malloc/free during query lifecycle.
403672008-10-28
8:55
2011-02-16
23:43
MySQL Server: Information schemaVerified
(6017 days)
S35.1.28, 5.1.29, 5.0, 5.1 bzrAnyAnySHOW on a broad view is taking too long
383972008-07-27
20:13
2018-09-09
20:45
MySQL Server: OptimizerVerified
(6195 days)
S35.1.26, 5.0.62AnyAnyselect distinct + order by desc is executed inefficiently
685722013-03-05
10:57
2014-02-19
16:19
MySQL Server: Federated storage engineVerified
(4513 days)
S35.5.25a, 5.5.31AnyAnyFEDERATED using SHOW TABLE STATUS causes performance problems for InnoDB tables
994322020-05-04
8:09
2020-05-05
12:04
MySQL Server: InnoDB storage engineVerified
(1897 days)
S58.0.20AnyARMImproving memory barrier during rseg allocation
950802019-04-23
7:24
2019-04-30
14:09
MySQL RouterVerified
(2267 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
899262018-03-06
10:20
2018-03-12
12:21
MySQL Server: C API (client library)Verified
(2681 days)
S55.7Linuxx86Performance degradation in libmysqlclient 20
915852018-07-10
1:16
2018-08-27
11:06
MySQL Server: Stored RoutinesVerified
(2561 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
(2567 days)
S55.6, 5.7, 8.0AnyAnysrv_conc_enter_innodb() is not optimal
643402012-02-15
14:07
2013-06-14
15:35
MySQL Server: InnoDB Plugin storage engineVerified
(4413 days)
S55.1.52, 5.1.61AnyAnyrace on no_flush event during buf_flush_free_margin
1004322020-08-05
7:55
2020-08-05
14:03
MySQL Server: Performance SchemaVerified
(1804 days)
S58.0.21AnyARMOptimal memory-barrier for performance-schema counter
1001192020-07-06
7:07
2020-08-14
13:55
MySQL Server: InnoDB storage engineVerified
(1795 days)
S58.0.20AnyARMSwitch to use relaxed memory barrier for redo-log counters
1000912020-07-02
12:23
2020-07-03
8:48
Connector / PythonVerified
(1837 days)
S58.0.18, 8.0.20AnyAnymysqlx interface is a lot slower than the connector.python interface
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