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