From: pgsql-admin-ow...@postgresql.org 
[mailto:pgsql-admin-ow...@postgresql.org] On Behalf Of JotaComm
Sent: Wednesday, September 04, 2013 10:57 AM
To: pgsql-admin@postgresql.org
Subject: [ADMIN] Problems with vacuum


Hello, everbody

I have the following problem: My vacuum is running since 2013-08-27 
18:58:41.527238-03.

billing=# SELECT localtimestamp(0);
-[ RECORD 1 ]------------------
timestamp | 2013-09-04 11:23:06

billing=# SELECT pg_stat_activity.procpid,pg_
stat_activity.current_query,pg_stat_activity.query_start FROM pg_stat_activity 
WHERE pg_stat_activity.current_query ~ 'public.mensagem' AND 
pg_stat_activity.procpid!=pg_backend_pid();
-[ RECORD 1 ]-+-----------------------------------------------------------
procpid       | 2738
current_query | autovacuum: VACUUM public.mensagem (to prevent wraparound)
query_start   | 2013-08-27 18:58:41.527238-03

I tried to cancel it but unsuccessful.

billing=# SELECT pg_cancel_backend(2738);
-[ RECORD 1 ]-----+--
pg_cancel_backend | t

billing=# SELECT localtimestamp(0);
-[ RECORD 1 ]------------------
timestamp | 2013-09-04 11:23:18

billing=# SELECT 
pg_stat_activity.procpid,pg_stat_activity.current_query,pg_stat_activity.query_start
 FROM pg_stat_activity WHERE pg_stat_activity.current_query ~ 'public.mensagem' 
AND pg_stat_activity.procpid!=pg_backend_pid();
-[ RECORD 1 ]-+-----------------------------------------------------------
procpid       | 2738
current_query | autovacuum: VACUUM public.mensagem (to prevent wraparound)
query_start   | 2013-08-27 18:58:41.527238-03

Any idea? Any tips?

Best regards

-- 
JotaComm
http://jotacomm.wordpress.com 


Why do you consider this a problem?  Autovacuum is just doing the job it's 
supposed to do.

How big mensagem table is?
How many autovacuum workers you have?  Does this long-running autovacuum 
prevent other tables from being vacuumed in-time?
Is there some other long running transaction involving this table and 
preventing autovacuum from doing its job?

Regards,
Igor Neyman

Regards,




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