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New GUC, track_iotiming, to track I/O timings.

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Currently, the only way to see the numbers this gathers is via
EXPLAIN (ANALYZE, BUFFERS), but the plan is to add visibility through
the stats collector and pg_stat_statements in subsequent patches.

Ants Aasma, reviewed by Greg Smith, with some further changes by me.
This commit is contained in:
Robert Haas
2012-03-27 14:52:37 -04:00
parent 98316e211b
commit 40b9b95769
8 changed files with 72 additions and 0 deletions
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src/include/storage/bufmgr.h
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@@ -48,6 +48,7 @@ extern PGDLLIMPORT int NBuffers;
extern bool zero_damaged_pages;
extern int bgwriter_lru_maxpages;
extern double bgwriter_lru_multiplier;
extern bool track_iotiming;
extern int target_prefetch_pages;
/* in buf_init.c */