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My PG server came to a screeching halt yesterday. Looking at top saw a very large number of "startup waiting" tasks. A pg_dump was running and one of my scripts had issued a CREATE DATABASE command. It looks like the CREATE DATABASE was exclusive but was having to wait for the pg_dump to finish, causing a massive traffic jam of locks behind it.
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pg_dump blocking create database?
- From: Dan Harris <fbsd(at)drivefaster(dot)net>
- To: PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org>
- Subject: pg_dump blocking create database?
- Date: Wed, 12 Sep 2007 13:58:36 -0600
My PG server came to a screeching halt yesterday. Looking at top saw a very large number of "startup waiting" tasks. A pg_dump was running and one of my scripts had issued a CREATE DATABASE command. It looks like the CREATE DATABASE was exclusive but was having to wait for the pg_dump to finish, causing a massive traffic jam of locks behind it.
Once I killed the pg_dump process, things returned to normal.Version 8.0.12. Is this a bug? It also concerns me because my workload is likely to expose this problem again.
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