Percona Server with XtraDB

buf_LRU_buf_pool_running_out() does not need to lock any mutexes

Reported by Laurynas Biveinis on 2013-09-02
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
MySQL Server
Unknown
Unknown
Percona Server
Status tracked in 5.6
5.1
Undecided
Unassigned
5.5
Medium
Unassigned
5.6
Medium
Laurynas Biveinis

Bug Description

This is to track fixing of http://bugs.mysql.com/bug.php?id=69258 for Percona Server.

buf_LRU_buf_pool_running_out() acquires buffer pool mutex in upstream, and LRU/free list mutexes in XtraDB. This is not really required, because the function compares the sum of LRU and free list lens with 1/4 of buffer pool size for heuristic purposes. Dirty reads are OK for this.

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tags: added: innodb
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