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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 89379 | 2018-01-24 11:41 | 2021-03-01 7:11 | MySQL Server: Performance Schema | Verified (1205 days) | S5 | 5.7.20, 5.7.21 | Any | Any | summary_by_user tables get extremely slow with many users. |
| 75272 | 2014-12-19 8:34 | 2017-12-23 10:45 | Connector / NET | Verified (1771 days) | S5 | 6.9.5.0 | Microsoft Windows | Any | Poor performance with Entity Framework Include Queries and Order By |
| 49276 | 2009-12-01 17:03 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4181 days) | S5 | 5.0.85-community-log, 5.0.89, 5.1.42 | Linux | Any | Optimization for IN (on InnoDB tables) depends on number of set elements |
| 41871 | 2009-01-05 15:47 | 2018-09-09 20:45 | MySQL Server: MyISAM storage engine | Verified (4241 days) | S5 | 5.1.30 | Any (MS Windows, Mac OS X) | Any | Select + Index + Limit + offset on large MyIsam tables give very bad performance |
| 52170 | 2010-03-18 9:57 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4070 days) | S5 | 5.1.44, mysql-next-mt | Linux (fc12) | Any | innodb query optimizer fails (null possible_keys) with multicolumn key |
| 34310 | 2008-02-05 14:51 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (2703 days) | S5 | 5.0.51a-log, 5.0.54, 5.6.14 | Linux | Any | Optimizer is inefficient by using ORDER BY function() and LIMIT |
| 8113 | 2005-01-24 15:43 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (4286 days) | S5 | 5.0, 5.1, azalea bzr | Any | Any | Select with between optimization |
| 77799 | 2015-07-22 13:36 | 2015-07-22 13:41 | MySQL Workbench | Verified (2122 days) | S5 | 6.3.4 | Ubuntu (15.04) | Any | MySQL Workbench Lockup when autosaving |
| 82725 | 2016-08-25 15:55 | 2016-09-14 6:28 | MySQL Server: Optimizer | Verified (1702 days) | S5 | 5.7.14, 5.7.15 | CentOS (Linux rda-db-rep.ucar.edu 3.10.0-327.28.2.el7.x86_64 #1 SMP Wed Aug 3 11:11:39 UTC 2016 x86_64 x86_6) | Any | Extremely slow query when optimizer_switch='derived_merge=ON' |
| 89149 | 2018-01-08 23:41 | 2018-01-16 17:07 | MySQL Server: Optimizer | Verified (1213 days) | S5 | 5.7.20 | Red Hat (7.4) | Any | SELECT DISTINCT on multiple TEXT columns is slow |
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