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| author | Robert Haas <rhaas@postgresql.org> | 2017-03-18 07:43:01 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2017-03-18 07:43:01 -0400 |
| commit | 249cf070e36721a65be74838c53acf8249faf935 (patch) | |
| tree | a2d6e4d443fff0466598ab7751fe7f4a443449ab /src/backend/access/transam/xlogutils.c | |
| parent | 928250aef5f8363825acbf58540328089c26b0d4 (diff) | |
| download | postgresql-249cf070e36721a65be74838c53acf8249faf935.tar.gz postgresql-249cf070e36721a65be74838c53acf8249faf935.zip | |
Create and use wait events for read, write, and fsync operations.
Previous commits, notably 53be0b1add7064ca5db3cd884302dfc3268d884e and
6f3bd98ebfc008cbd676da777bb0b2376c4c4bfa, made it possible to see from
pg_stat_activity when a backend was stuck waiting for another backend,
but it's also fairly common for a backend to be stuck waiting for an
I/O. Add wait events for those operations, too.
Rushabh Lathia, with further hacking by me. Reviewed and tested by
Michael Paquier, Amit Kapila, Rajkumar Raghuwanshi, and Rahila Syed.
Discussion: http://postgr.es/m/CAGPqQf0LsYHXREPAZqYGVkDqHSyjf=KsD=k0GTVPAuzyThh-VQ@mail.gmail.com
Diffstat (limited to 'src/backend/access/transam/xlogutils.c')
| -rw-r--r-- | src/backend/access/transam/xlogutils.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlogutils.c b/src/backend/access/transam/xlogutils.c index 8b99b782497..b2b9fcbebb0 100644 --- a/src/backend/access/transam/xlogutils.c +++ b/src/backend/access/transam/xlogutils.c @@ -24,6 +24,7 @@ #include "access/xlogutils.h" #include "catalog/catalog.h" #include "miscadmin.h" +#include "pgstat.h" #include "storage/smgr.h" #include "utils/guc.h" #include "utils/hsearch.h" @@ -728,7 +729,9 @@ XLogRead(char *buf, TimeLineID tli, XLogRecPtr startptr, Size count) else segbytes = nbytes; + pgstat_report_wait_start(WAIT_EVENT_WAL_READ); readbytes = read(sendFile, p, segbytes); + pgstat_report_wait_end(); if (readbytes <= 0) { char path[MAXPGPATH]; |