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DevOps-Bash-tools/sql/postgres_blocked_queries.sql

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SQL

--
-- Author: Hari Sekhon
-- Date: 2020-08-05 18:53:54 +0100 (Wed, 05 Aug 2020)
--
-- vim:ts=2:sts=2:sw=2:et:filetype=sql
--
-- https://github.com/harisekhon/bash-tools
--
-- 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
--
-- Lists PostgreSQL queries blocked along with the pids of those holding the locks blocking them
--
-- Requires PostgreSQL >= 9.6
--
-- Tested on PostgreSQL 12.3
SELECT
pid,
user,
pg_blocking_pids(pid) AS blocked_by_pids,
query AS blocked_query
FROM
pg_stat_activity
WHERE
cardinality(pg_blocking_pids(pid)) > 0;