On Wed, 2006-12-06 at 15:53, asif ali wrote: > Thanks Everybody for helping me out. > I checked "pg_stat_activity"/pg_locks, but do not see any activity on > the table. > How to find a old running transaction... > I saw this link, but it did not help.. > http://archives.postgresql.org/pgsql-hackers/2005-02/msg00760.php Sometimes just using top or ps will show you. on linux you can run top and then hit c for show command line and look for ones that are IDLE Or, try ps: ps axw|grep postgres On my machine normally: 2408 ? S 0:00 /usr/local/pgsql/bin/postmaster -p 5432 -D /home/postgres/data 2615 ? S 0:00 postgres: stats buffer process 2616 ? S 0:00 postgres: stats collector process 2857 ? S 0:00 postgres: writer process 2858 ? S 0:00 postgres: stats buffer process 2859 ? S 0:00 postgres: stats collector process But with an idle transaction: 2408 ? S 0:00 /usr/local/pgsql/bin/postmaster -p 5432 -D /home/postgres/data 2615 ? S 0:00 postgres: stats buffer process 2616 ? S 0:00 postgres: stats collector process 2857 ? S 0:00 postgres: writer process 2858 ? S 0:00 postgres: stats buffer process 2859 ? S 0:00 postgres: stats collector process 8679 ? S 0:00 postgres: smarlowe test [local] idle in transaction Thar she blows! Also, you can restart the database and vacuum it then too. Of course, don't do that during regular business hours...