Jenish Vyas wrote: [unexpectedly runs out of connections] > Exact Error Message is as follow.. > > [ERROR] Error getting DB connection: The connection attempt failed. > [ERROR] Action commit error: Out of database connections. > > This is the output I am getting form application server, On database end I am getting nothing. > > plz suggest. Please try not to top-post. Both of those error messages are not form PostgreSQL, so they don't help much. You might get more in the database log if you set log_connections = on in postgresql.conf and reload (make sure that log_min_messages is "fatal" or lower). It also wouldn't hurt to try and count the actual connections when you hit the problem (SELECT count(*) FROM pg_stat_activity) and check if that's close to max_connections. Have you considered the possibility that the limit and the error do not originate in that database, but in the application server? > If possible guide me how to calculate max_connections based on available hardware. It is almost unlimited on any hardware. That does not mean that things will perform well beyond a certain limit. The limiting factor I mentioned is the operating system, and these limits can usually be adjusted. Yours, Laurenz Albe -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general