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How to know killed by pg_terminate_backend

From: Tatsuo Ishii <ishii(at)postgresql(dot)org>
To: pgsql-hackers(at)postgresql(dot)org
Subject: How to know killed by pg_terminate_backend
Date: 2010-05-13 00:24:52
Message-ID: (view raw or whole thread)
Lists: pgsql-hackers

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

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().

Tatsuo Ishii
SRA OSS, Inc. Japan


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