Hello Everyone, Here I have got and error of concurrent update, Transaction Rollback Error: deadlock detected process 4801 waits for sharelock on transaction 944461 blocked by process 4700. process 4700 waits for sharelock on transaction 9444665 blocked by process 4801. by default PostgreSQL server has to abort one transaction and proceed the other one, in my case it did not. Solutions will highly appreciated -- View this message in context: http://postgresql.nabble.com/Transaction-Rollback-Error-DeadLock-Detected-tp5887760.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general