Обсуждение: Long running transaction in pg_activity_log

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Long running transaction in pg_activity_log

От
"Sachchida Ojha"
Дата:

I see some long running transaction in my pg_activity_log table. My app becomes almost unusable. My question is
How can I query the database to see what sql these transactions are running.

16385;"em_db";20893;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:38:06.527792+00";"2007-08-22 20:37:33.937193+00";"127.0.0.1";52466

16385;"em_db";15110;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:05:08.580643+00";"2007-08-22 19:39:11.670572+00";"127.0.0.1";50961

16385;"em_db";15113;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:06:01.53394+00";"2007-08-22 19:39:11.704564+00";"127.0.0.1";50964

Thanks
Regards
Sachi

Re: Long running transaction in pg_activity_log

От
"Sachchida Ojha"
Дата:
I can see SQL in the current SQL column of pg_activity_log when I run sql from sql window or throgh odbc/jdbc connection but when sql is embedded in java beaans i can see those sql.  Is there any way to extract those sql from the database.
 
 
16385;"em_db";20220;16388;"emsowner";"select * from pg_stat_activity;";f;"2007-08-22 20:48:25.062663+00";"2007-08-22 20:30:58.600489+00";"10.0.200.165";4170
 

Regards
Sachchida

 

From: pgsql-performance-owner@postgresql.org [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Sachchida Ojha
Sent: Wednesday, August 22, 2007 4:40 PM
To: pgsql-performance@postgresql.org
Subject: [PERFORM] Long running transaction in pg_activity_log

I see some long running transaction in my pg_activity_log table. My app becomes almost unusable. My question is
How can I query the database to see what sql these transactions are running.

16385;"em_db";20893;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:38:06.527792+00";"2007-08-22 20:37:33.937193+00";"127.0.0.1";52466

16385;"em_db";15110;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:05:08.580643+00";"2007-08-22 19:39:11.670572+00";"127.0.0.1";50961

16385;"em_db";15113;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:06:01.53394+00";"2007-08-22 19:39:11.704564+00";"127.0.0.1";50964

Thanks
Regards
Sachi

Re: Long running transaction in pg_activity_log

От
Tobias Brox
Дата:
[Sachchida Ojha - Wed at 04:40:09PM -0400]
> I see some long running transaction in my pg_activity_log table. My app
> becomes almost unusable. My question is
> How can I query the database to see what sql these transactions are
> running.

"<IDLE> in transaction" means that no sql query is running at the
moment.

Most probably it's a problem with the application, it starts a
transaction, but does not close it (through a commit or rollback).  This
is very harmful for the performance, as the hours, days and weeks pass
by any database supporting transactions will get problems.

Restarting the application and vacuuming is a one-time-shot which should
solve the problem for a short while.  For a permanent fix, the
application needs to be fixed, or you'll have to ensure that the
autocommit feature is used.

Re: Long running transaction in pg_activity_log

От
Farhan Mughal
Дата:

If I am not wrong, you must be asking about this:

select * from pg_stat_activity;

If you see <command string not enabled> in the query column.

 

Turn on the stats_command_string option in postgresql.conf.


Regards,

Farhan




----- Original Message ----
From: Sachchida Ojha <sojha@secure-elements.com>
To: pgsql-performance@postgresql.org
Sent: Thursday, 23 August, 2007 1:40:09 AM
Subject: [PERFORM] Long running transaction in pg_activity_log

I see some long running transaction in my pg_activity_log table. My app becomes almost unusable. My question is
How can I query the database to see what sql these transactions are running.

16385;"em_db";20893;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:38:06.527792+00";"2007-08-22 20:37:33.937193+00";"127.0.0.1";52466

16385;"em_db";15110;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:05:08.580643+00";"2007-08-22 19:39:11.670572+00";"127.0.0.1";50961

16385;"em_db";15113;16386;"em_user";"<IDLE> in transaction";f;"2007-08-22 20:06:01.53394+00";"2007-08-22 19:39:11.704564+00";"127.0.0.1";50964

Thanks
Regards
Sachi

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