postgres_sessions_state_count.sql

--
--  Author: Hari Sekhon
--  Date: 2020-08-06 00:23:40 +0100 (Thu, 06 Aug 2020)
--
--  vim:ts=4:sts=4:sw=4:et:filetype=sql
--
--  https://github.com/HariSekhon/SQL-scripts
--
--  License: see accompanying Hari Sekhon LICENSE file
--
--  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
--
--  https://www.linkedin.com/in/HariSekhon
--

-- PostgreSQL count of sessions in each state
--
-- Requires PostgreSQL 9.2+
--
-- Tested on PostgreSQL 9.2+, 10.x, 11.x, 12.x, 13.0

SELECT
    count(1),
    state
FROM
    pg_stat_activity
GROUP BY
    state
ORDER BY
    1 DESC;