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94c316069e
a significant performance drop for high concurrency bechmarks (bug #11765850 - 58854). Here's the comment of the patch commit: The bug is that the InnoDB pre-fetch cache was not being used in row_search_for_mysql(). Secondly the changeset that planted the bug also introduced some inefficient code. It would read an extra row, convert it to MySQL row format (for ICP==off), copy the row to the pre-fetch cache row buffer, then check for cache overflow and dequeue the row that was pushed if there was a possibility of a cache overflow. |
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| archive | ||
| blackhole | ||
| csv | ||
| example | ||
| federated | ||
| federatedx | ||
| heap | ||
| ibmdb2i | ||
| innobase | ||
| innodb_plugin | ||
| maria | ||
| myisam | ||
| myisammrg | ||
| ndb | ||
| oqgraph | ||
| pbxt | ||
| sphinx | ||
| xtradb | ||
| Makefile.am | ||
| mysql_storage_engine.cmake | ||