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ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
---|---|---|---|---|---|---|---|---|---|
21978 | 2006-09-01 22:13 | 2011-02-16 23:43 | MySQL Server: Options | Verified (5959 days) | S3 | 4.0.18, 5.0, 6.0.10, 5.5 | Windows (Windows 2000) | Any | 'flush_time' value set for 1800 sec. on Non Win9x/Me installs by default |
58928 | 2010-12-14 20:58 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4854 days) | S3 | 5.1-bugteam | Any | Any | "not exists" optimization not applied if relevant table is not single inner one |
91585 | 2018-07-10 1:16 | 2018-08-27 11:06 | MySQL Server: Stored Routines | Verified (2089 days) | S5 | 5.7, 8.0, 8.0.11, 5.7.23 | Any | Any | “dead” code inside the stored proc or function can significantly slow it down |
48359 | 2009-10-27 19:24 | 2012-05-18 20:19 | MySQL Cluster: Cluster (NDB) storage engine | In progress (5027 days) | S3 | mysql-5.1-telco-7.1 | Linux (RHEL 4) | Any | ALTER TABLE xx COMMENT - locks large tables |
60261 | 2011-02-26 0:59 | 2016-11-12 22:57 | MySQL Cluster: Cluster (NDB) storage engine | Verified (2694 days) | S5 | mysql-cluster-gpl-7.1.9a | Any | Any | Are transaction hints needed in these situation? |
75504 | 2015-01-14 12:52 | 2015-01-22 14:51 | MySQL Server: InnoDB storage engine | Verified (3354 days) | S5 | Any | Any | btr_search_guess_on_hash makes found block young twice? | |
27452 | 2007-03-26 17:35 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (5611 days) | S3 | 5.0.40-BK, 5.0.24a-debian-log, 5.1.31-bzr, 6.0.7-alpha, 6.0.9-bzr | Linux | Any | Correlated subquery produces inefficient optimizer plan for INFORMATION_SCHEMA |
30342 | 2007-08-09 18:52 | 2015-10-07 14:54 | MySQL Server: Optimizer | Verified (3096 days) | S5 | 5.0.37, 5.6.17 | Any | Any | Equality propagation can make optimization much slower |
68572 | 2013-03-05 10:57 | 2014-02-19 16:19 | MySQL Server: Federated storage engine | Verified (4041 days) | S3 | 5.5.25a, 5.5.31 | Any | Any | FEDERATED using SHOW TABLE STATUS causes performance problems for InnoDB tables |
105982 | 2021-12-27 8:11 | 2022-01-03 8:02 | MySQL Server: Storage Engines | Verified (816 days) | S5 | all, 5.7, 8.0 | Linux | Any | hard-coded libaio API parameter may not helpful to performance |
83151 | 2016-09-26 14:27 | 2021-09-14 10:08 | MySQL Server: Connection Handling | Verified (1892 days) | S2 | 5.6.33 | CentOS | Any | high number of SHOW WARNINGS can stall server if compressed protocol in use |
99432 | 2020-05-04 8:09 | 2020-05-05 12:04 | MySQL Server: InnoDB storage engine | Verified (1425 days) | S5 | 8.0.20 | Any | ARM | Improving memory barrier during rseg allocation |
110779 | 2023-04-24 11:32 | 2023-05-12 5:49 | MySQL Server: Optimizer | Verified (322 days) | S5 | 8.0.33, 5.7.42 | Any | Any | IN clause cause pick bad performan index |
62018 | 2011-07-28 15:15 | 2018-02-11 20:45 | MySQL Server: InnoDB storage engine | Verified (4090 days) | S5 | 5.6.3 | Any | Any | innodb adaptive hash index mutex contention |
75962 | 2015-02-19 3:14 | 2015-03-03 20:46 | MySQL Server: InnoDB storage engine | Verified (3314 days) | S3 | 5.6.24, 5.7.6 | Any | Any | Innodb calls fsync when freeing a LRU page to fulfill page request |
55979 | 2010-08-13 22:05 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4974 days) | S5 | 5.1.39 | Linux | Any | Key not used if IN() list contains mix of strings and integers |
35165 | 2008-03-08 17:48 | 2022-12-04 20:45 | MySQL Server: CSV | Verified (5861 days) | S5 | 5.1 | Any | Any | Logging to table is slow for large queries |
59727 | 2011-01-25 21:36 | 2016-12-04 20:45 | MySQL Server: InnoDB storage engine | Verified | S5 | 5.1 plugin, 5.5, 5.6 | Any | Any | LRU search can be inefficient with compression |
56924 | 2010-09-22 11:26 | 2018-06-24 20:45 | MySQL Workbench: SQL Editor | Verified (4501 days) | S2 | 5.2.28 | Linux (Ubuntu 10.04) | Any | Memory leak? Possibly not a bug. |
47884 | 2009-10-07 3:24 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (5173 days) | S2 | 5.1.39, 5.1.44, 5.5.99 | Linux (Linux web2 2.6.18-92.1.18.el5.028stab060.8 #1 SMP Mon Feb 9 21:44:50 MSK 2009 x86_64) | Any | MySQL 5.1.39 failed to use index |
81630 | 2016-05-28 5:46 | 2016-08-31 6:30 | MySQL Server: Replication | Verified (2767 days) | S5 | 5.7.12 | Any | Any | MySQL 5.7 is 37-45% slower then 5.6 when using binlogging due to defaults change |
75981 | 2015-02-20 13:56 | 2017-11-05 7:12 | MySQL Server: InnoDB storage engine | Verified (3277 days) | S5 | 5.7.6 | Any | Any | MySQL 5.7.5 30% slower than 5.6.23 for 1 thread write |
114331 | 2024-03-12 21:53 | 2024-03-19 9:48 | MySQL Server: InnoDB storage engine | Verified (10 days) | S5 | 8.0.*, 8.0.36 | Linux | x86 | MySQL get high insert latency in low concurrency |
95080 | 2019-04-23 7:24 | 2019-04-30 14:09 | MySQL Router | Verified (1795 days) | S5 | 8.0.15, 8.0.16 | Oracle 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 |
59557 | 2011-01-17 15:26 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4820 days) | S2 | 5.1, 5.5 | Any | Any | MySQL uses order of fields in GROUP BY when ORDER BY NULL is specified |
56965 | 2010-09-23 9:22 | 2015-08-10 14:34 | MySQL Server: mysqldump Command-line Client | Verified (4930 days) | S3 | 5.1.44 | Linux (2.6.18-164.6.1.el5 #1 SMP, CentOS 5.5) | Any | mysqldump poor performance with large number of tables |
100091 | 2020-07-02 12:23 | 2020-07-03 8:48 | Connector / Python | Verified (1365 days) | S5 | 8.0.18, 8.0.20 | Any | Any | mysqlx interface is a lot slower than the connector.python interface |
78355 | 2015-09-07 15:53 | 2015-09-15 8:51 | MySQL Server: Optimizer | Verified (3118 days) | S5 | 5.5.41, 5.5.46, 5.5.47 | Ubuntu (x64) | Any | nested select query not work on mysql 5.5 but it works well in mysql 5.6 |
67913 | 2012-12-16 2:31 | 2017-07-18 5:39 | Connector / ODBC | Verified (4085 days) | S5 | 5.2.2, 5.1.11 | Windows (Windows 7 and 8 64-bit) | Any | ODBC connector performance problem |
100432 | 2020-08-05 7:55 | 2020-08-05 14:03 | MySQL Server: Performance Schema | Verified (1332 days) | S5 | 8.0.21 | Any | ARM | Optimal memory-barrier for performance-schema counter |
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