LRU manager thread accounts its flushes under buffer_flush_background innodb metrics

Bug #1491420 reported by Laurynas Biveinis on 2015-09-02
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Percona Server moved to https://jira.percona.com/projects/PS
Fix Released
Medium
Laurynas Biveinis
5.1
Invalid
Undecided
Unassigned
5.5
Invalid
Undecided
Unassigned
5.6
Fix Released
Medium
Laurynas Biveinis

Bug Description

LRU manager thread added

    MONITOR_INC_VALUE_CUMULATIVE(
     MONITOR_FLUSH_BACKGROUND_TOTAL_PAGE,
     MONITOR_FLUSH_BACKGROUND_COUNT,
     MONITOR_FLUSH_BACKGROUND_PAGES,
     n_flushed);

call for its flushed pages. Thus LRU flushes by its thread are accounted as buffer_flush_background*, which is supposed to be idle server flush list flushing only. LRU flushes are already accounted as buffer_LRU_batches / buffer_LRU_batch_pages / buffer_LRU_batch_total_pages.

tags: added: xtradb

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-1648

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