Re: dangling connections -- Postgresql Admin

On Tue, May 15, 2012 at 3:31 AM, Sergey Konoplev <gray.ru@xxxxxxxxx> wrote:

select client_addr, client_port from pg_stat_activity;

after shutting down the Tomcat and find out what holds the <client_port> on
the <client_addr>

[user@<client_addr> ~]$ sudo netstat -pnao | grep <client_port>

The second column from the right will be the process pid.

My system is running fine at present, but I thought I'd just mess with the above. Oddly, it seems Tomcat is holding 56 connections while PG is holding only 51.

netstat -pnao | grep 5432 | sort | head

Tomcat server

tcp 0 0 ::ffff:172.16.103.122:33440 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33441 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33442 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33443 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33444 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33775 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:33776 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:35117 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:35118 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

tcp 0 0 ::ffff:172.16.103.122:35119 ::ffff:172.16.101.157:5432 ESTABLISHED 14423/java off (0.00/0/0)

Postgresql server

tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN 5666/postmaster off (0.00/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:33775 ESTABLISHED 17410/postgres: otr keepalive (4815.62/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:33776 ESTABLISHED 17411/postgres: otr keepalive (4815.63/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35117 ESTABLISHED 16921/postgres: pos keepalive (2277.28/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35118 ESTABLISHED 16922/postgres: pos keepalive (2277.29/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35119 ESTABLISHED 16923/postgres: otr keepalive (2280.08/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35120 ESTABLISHED 16926/postgres: pos keepalive (2290.73/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35121 ESTABLISHED 16927/postgres: pos keepalive (2290.73/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35122 ESTABLISHED 16928/postgres: pos keepalive (2290.74/0/0)

tcp 0 0 172.16.101.157:5432 172.16.103.122:35123 ESTABLISHED 16929/postgres: pos keepalive (2290.74/0/0)