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| author | Sergey Petrunya <psergey@askmonty.org> | 2013-04-01 18:03:14 +0400 |
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| committer | Sergey Petrunya <psergey@askmonty.org> | 2013-04-01 18:03:14 +0400 |
| commit | 763af1a8a3a894df7326303b062bc55121103cb0 (patch) | |
| tree | 6cf152307269bd37d1652c82c860fbf1fae5e194 /man/myisam_ftdump.1 | |
| parent | 3345e7564d033313ac54ca34d1505d6a2e78cdad (diff) | |
| download | mariadb-git-763af1a8a3a894df7326303b062bc55121103cb0.tar.gz | |
MDEV-4240: mariadb 5.3.12 using more memory than MySQL 5.1 for an inefficient query
- Let index_merge allocate table handlers on quick select's MEM_ROOT,
not on statement's MEM_ROOT.
This is crucial for big "range checked for each record" queries, where
index_merge can be created and deleted many times during query exection.
We should not make O(#rows) allocations on statement's MEM_ROOT.
Diffstat (limited to 'man/myisam_ftdump.1')
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