Message-ID: <28414c4c93ffa0ceab8a475747825de558ddf1ea.camel@cybertec.at>
Subject: Re: Finding detailed information about LOCKS
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Wasim Devale <wasimd60@gmail.com>
Cc: Siraj G <tosiraj.g@gmail.com>, Pgsql-admin
	 <pgsql-admin@lists.postgresql.org>
Date: Fri, 03 May 2024 08:26:00 +0200
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On Fri, 2024-05-03 at 11:52 +0530, Wasim Devale wrote:
> On Fri, 3 May, 2024, 11:46=E2=80=AFam Laurenz Albe, <laurenz.albe@cyberte=
c.at> wrote:
> > On Fri, 2024-05-03 at 10:54 +0530, Siraj G wrote:
> > > I come from Oracle background. In Oracle there is a licensed feature =
(Diagnostics=C2=A0+ Tuning)
> > > upon using which the system keeps historic session records, which giv=
es a better way
> > > to find out locking related details- like the blocking session, total=
 sessions blocked
> > > and the time the blocking event was active. I am finding it a little =
hard in PgSQL
> > > to find this information.=C2=A0
> > >=20
> > > I am seeking help in finding a detailed analysis on the locks that ha=
ppened yesterday,
> > > 2 days back or in the last week. Can someone assist please.
> >=20
> > PostgreSQL doesn't keep historical information on these things.
> >=20
> > You need a monitoring tool like pgwatch2 that takes regular snapshots o=
f these data
> > and allows you to access this information.
>
> Can we not use pgbadger?

pgBadger can only collect what is in the log file.  How would you get that =
information
into the log file?  The best you can get in the log file is the information=
 from
"log_lock_waits =3D on", which is information about situations where somebo=
dy had to
wait for a lock for more than a second.  Definitely useful, but capturing "=
pg_stat_activity"
snapshots will provide more infrmation.

Yours,
Laurenz Albe