Re: Monitoring

On Wed, 5 Mar 2003, Delao, Darryl W wrote:

> Anyone aware of any tool or command line option to view active and inactive
> postgres connections? Is there a setting in postgres that sets the
> Time_Wait to something lower? Also, is there a command to kill a specific
> connection at any given time?

Postgres starts a server process for each client connection. You can use
/bin/ps to show the active connection processes. The process command
string gives some information about what each connection is doing -- the
user and database being used, whether the connection is idle or processing
a query and the type of the query, as well as whether it's in a
transaction.

You can kill a connection, simply by killing the corresponding postgres
process.

% ps -auwwx | grep ^pgsql

pgsql 52081 Tue03PM 0:02.27 /usr/local/bin/postmaster (postgres)
pgsql 52082 Tue03PM 0:00.20 postmaster: stats buffer process (postgres)
pgsql 52084 Tue03PM 0:00.98 postmaster: stats collector process (postgres)
pgsql 65062 5:05PM 0:04.25 postmaster: ocrow ocrow [local] SELECT (postgres)
pgsql 65071 5:05PM 0:00.04 postmaster: ocrow ocrow [local] idle (postgres)

In this list process 65062 is executing a select query, and 65071
is idle.

Oliver