| From: | Guillaume Lelarge <guillaume(at)lelarge(dot)info> |
|---|---|
| To: | chris(at)chriscurvey(dot)com |
| Cc: | pgsql <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: meaning of "waiting" column in pg_stat_activity? |
| Date: | 2012-07-23 20:46:54 |
| Message-ID: | 1343076414.2039.22.camel@localhost.localdomain |
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| Lists: | pgsql-general |
On Mon, 2012-07-23 at 16:13 -0400, Chris Curvey wrote:
> Just wondering...if a query is "waiting", what is it waiting for?
Locks.
> Is
> this only for locks, or can it be for disk, or a memory buffer?
Only locks.
> (If
> there is a description of the meaning of things in pg_stat_activity
> and it's relatives, I'd love a pointer, 'cause I can't seem to find
> it.)
There isn't much at the moment. 9.2 docs will be better in that regard.
See
http://www.postgresql.org/docs/9.2/static/monitoring-stats.html#PG-STAT-ACTIVITY-VIEW for example (but be careful that some columns of pg_stat_activity change in 9.2).
--
Guillaume
http://blog.guillaume.lelarge.info
http://www.dalibo.com
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