pgBadger may also be useful for you. It analyzes logs and creates graphs of query traffic.
http://dalibo.github.io/pgbadger/
From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of David G. Johnston
Sent: Friday, October 27, 2017 8:59 AM
To: Syed Asim Shah <asim.shah@telenor.com.pk>
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] SQL history.
Dear Team,
We are having POSGRESQL version 9.6 installed on OS version Linux REDHAT 7.2. How we can fetch historical SQL executions trend of last 24 hours.
For possibilities. Neither are installed/configured/enabled by default to capture the information you seek.
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