Horton

How to know killed by pg_terminate_backend

Tatsuo Ishii <ishii@postgresql.org>

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From: Tatsuo Ishii <ishii@postgresql.org>
To: pgsql-hackers@postgresql.org
Date: 2010-05-13T00:24:52Z
Lists: pgsql-hackers 
Hi,

If a backend killed by pg_terminate_backend(), the backend returns
57P01 which is identical to the one when it's killed by postmaster.

Problem is, pgpool-II needs to trigger failover if postmaster goes
down because apparently pgpool-II cannot use the PostgreSQL server
anymore.

On the otherhand, pg_terminate_backend() just terminates a backend. So
triggering failover is overkill.

Maybe we could make PostgreSQL a little bit smarter so that it returns
a different code than 57P01 when killed by pg_terminate_backend().

Comments?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp