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| author | Robert Haas <rhaas@postgresql.org> | 2012-03-27 14:52:37 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2012-03-27 14:55:02 -0400 |
| commit | 40b9b957694cf7749c420c6c51a7e1d3c9b1fec1 (patch) | |
| tree | ab94826c3e20f7fe0a63edb3370be8a8988fd31f /doc/src | |
| parent | 98316e211b60cb160247171e3557b40a247c4610 (diff) | |
| download | postgresql-40b9b957694cf7749c420c6c51a7e1d3c9b1fec1.tar.gz postgresql-40b9b957694cf7749c420c6c51a7e1d3c9b1fec1.zip | |
New GUC, track_iotiming, to track I/O timings.
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.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/config.sgml | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 3e178759a29..9baaa3fb36a 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -4284,6 +4284,21 @@ COPY postgres_log FROM '/full/path/to/logfile.csv' WITH csv; </listitem> </varlistentry> + <varlistentry id="guc-track-iotiming" xreflabel="track_iotiming"> + <term><varname>track_iotiming</varname> (<type>boolean</type>)</term> + <indexterm> + <primary><varname>track_iotiming</> configuration parameter</primary> + </indexterm> + <listitem> + <para> + Enables timing of database I/O calls. This parameter is off by + default, because it will repeatedly query the operating system for + the current time, which may cause significant overhead on some + platforms. Only superusers can change this setting. + </para> + </listitem> + </varlistentry> + <varlistentry id="guc-track-functions" xreflabel="track_functions"> <term><varname>track_functions</varname> (<type>enum</type>)</term> <indexterm> |