From: Tom Lane <tgl@sss.pgh.pa.us>
To: neeraj kumar <neeru.cse@gmail.com>
Cc: pgsql-admin@postgresql.org
Cc: pgsql-general@postgresql.org
Subject: Re: Query on pg_stat_activity table got stuck
Date: Mon, 06 May 2019 17:33:06 -0400
Message-ID: <15877.1557178386@sss.pgh.pa.us> (raw)
In-Reply-To: <CAPR3Wj5Z17=+eeyrn_ZDG3NQGYgMEOY6JV6Y-WRRhGgwc16U3Q@mail.gmail.com>
References: <CAPR3Wj5Z17=+eeyrn_ZDG3NQGYgMEOY6JV6Y-WRRhGgwc16U3Q@mail.gmail.com>
neeraj kumar <neeru.cse@gmail.com> writes:
> We are using PG 10.6. We have one cron job that queries pg_stat_activity
> table to find out how many queries are running longer than X minutes and
> generate metrics.
> Query look like this :
> SELECT * FROM pg_stat_activity WHERE state='active'
> After some days, this query get stuck and doesn't finish. We tried to run
> this query manually and same result.
> We looked into pg_locks table and there this query is not blocked on any
> lock :
> https://justpaste.it/48rpe
Interesting. Can you get a stack trace to show where in the code it's
stuck?
https://wiki.postgresql.org/wiki/Generating_a_stack_trace_of_a_PostgreSQL_backend
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, neeru.cse@gmail.com, pgsql-general@postgresql.org
Subject: Re: Query on pg_stat_activity table got stuck
In-Reply-To: <15877.1557178386@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox