Thread: meaning of "waiting" column in pg_stat_activity?
Just wondering...if a query is "waiting", what is it waiting for? Is this only for locks, or can it be for disk, or a memory buffer? (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.) -- e-Mail is the equivalent of a postcard written in pencil. This message may not have been sent by me, or intended for you. It may have been read or even modified while in transit. e-Mail disclaimers have the same force in law as a note passed in study hall. If your corporate attorney says that you need an disclaimer in your signature, you need a new corporate attorney.
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 somecolumns of pg_stat_activity change in 9.2). -- Guillaume http://blog.guillaume.lelarge.info http://www.dalibo.com