On Tue, Dec 11, 2012 at 1:19 PM, Osborn, Jeff <jeosborn@xxxxxxxxxx> wrote: > I am seeing some strange performance on a new pg9.1 instance. We are seeing occasional statement timeouts on some TRUNCATEs and INSERTs. In both cases, the statements are quite simple: > - TRUNCATE schema.table; > - INSERT INTO schema.table VALUES ($1,2,$2,''); > > Sometimes these will succeed. Occasionally I see timeouts. The statement_timeout is set to 60 seconds. These tables are not particularly large; in the case of the insert, the table only has three rows. A most common case is when backup (pg_dump*) is running TRUNCATE has to wait for it because it acquires an access exclusive lock on a table and all other queries including INSERT have to wait for the TRUNCATE. Check the backup case first. > Our previous Postgresql 8.2 instance did not have this problem. This is strange for me. -- Sergey Konoplev Database and Software Architect http://www.linkedin.com/in/grayhemp Phones: USA +1 415 867 9984 Russia, Moscow +7 901 903 0499 Russia, Krasnodar +7 988 888 1979 Skype: gray-hemp Jabber: gray.ru@xxxxxxxxx -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
