Re: pg_dump blocking create database? - Mailing list pgsql-performance

From Tom Lane
Subject Re: pg_dump blocking create database?
Date
Msg-id 25728.1189653673@sss.pgh.pa.us
Whole thread Raw
In response to pg_dump blocking create database?  (Dan Harris <fbsd@drivefaster.net>)
List pgsql-performance
Dan Harris <fbsd@drivefaster.net> writes:
> 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's operating as designed :-(.  8.1 and later use less strict locking
on pg_database during create/drop database.

            regards, tom lane

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