On Mon, Mar 17, 2008 at 8:28 PM, hogcia <
hogcia@gmail.com> wrote:
Hi,
I have to find a Postgres database process pid (or other
identification) for a given client process pid. Or client processes
for a database process. How are they connected? I was suggested maybe
netstat could give me the answer and I think those are two pf_unix
processes. But maybe there are some PostgreSQL functions that do this?
How should I approach this topic?
If possible, execute the following query from your client, and it will show that server process the client is connected to.
select pg_backend_pid();
This is an easy, one way route to determine a client's shadow process, be it local or remote.
If you want reverse lookup, that is, trying to find out which backend process is servicing which client, it'd be a bit difficult. You have to query pg_stat_activity and the client_addr and client_port columns wil give you some information about the remote clients. For local clients using Unix sockets, these columns are null.
Best regards,
--
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