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| author | Inaam Rana <inaam.rana@oracle.com> | 2011-07-19 10:37:37 -0400 |
|---|---|---|
| committer | Inaam Rana <inaam.rana@oracle.com> | 2011-07-19 10:37:37 -0400 |
| commit | aa3d29681e7ac0e005d04b2c18127746b7bd9f9e (patch) | |
| tree | 803e4b6a9b82059d701288fcba5659485cf7a796 /sql/gen_lex_hash.cc | |
| parent | 0f543e8e9d042c0f58ffdda7b086d773de5500bd (diff) | |
| download | mariadb-git-aa3d29681e7ac0e005d04b2c18127746b7bd9f9e.tar.gz | |
Bug 12356373 - PERFORMANCE REGRESSION FROM 5.1 TO 5.5 : GROUP BY:
The title of the bug is a little confusing. The actual fix is to
reintroduce random readahead inside InnoDB with a dynamic, global
switch innodb_random_read_ahead [default = off].
Approved by: Sunny Bains
rb://696
Diffstat (limited to 'sql/gen_lex_hash.cc')
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