Re: [PERFORM] Postgres Query Plan Live Lock

2014-02-04 Thread Peter Geoghegan
On Mon, Feb 3, 2014 at 1:35 PM, Pweaver (Paul Weaver) wrote: > We have been running into a (live lock?) issue on our production Postgres > instance causing queries referencing a particular table to become extremely > slow and our application to lock up. Livelock? Really? That would imply that the

Re: [PERFORM] Re: Increased memory utilization by pgsql backend after upgrade from 9.1.3 to 9.2.6

2014-02-04 Thread Claudio Freire
On Thu, Jan 30, 2014 at 2:43 PM, Dattaram Porob wrote: > > Looks like this memory is being used to cache the query plan. Any ideas, why > it is occupying such a huge heap in 9.2.6 as compared to 9.1.3 ? I know that > the same SQL function occupies around 25MB heap in 9.1.3. > > Any thoughts/commen

[PERFORM] Planner estimates and VACUUM/autovacuum

2014-02-04 Thread Artur ZajÄ…c CFI
Hi, I am not sure if it is bug or not but I found some strange behaviour. Maybe it is the same as described on http://www.postgresql.org/message-id/14616.1244317...@sss.pgh.pa.us ?). If yes - I'm sorry for the trouble, but I think that my example is more obvious. Tested on PostgreSQL 9.2.4

[PERFORM] Postgres Query Plan Live Lock

2014-02-04 Thread Pweaver (Paul Weaver)
We have been running into a (live lock?) issue on our production Postgres instance causing queries referencing a particular table to become extremely slow and our application to lock up. This tends to occur on a particular table that gets a lot of queries against it after a large number of deletes