Re: No AVworkers when PM_RECOVERY_CONSISTENT

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: No AVworkers when PM_RECOVERY_CONSISTENT
Date: 2009-09-05 15:06:56
Message-ID: 3500.1252163216@sss.pgh.pa.us
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Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> When pmState == PM_RECOVERY_CONSISTENT we run
> SignalAutovacWorkers(SIGTERM);
> at normal shutdown

> This currently does nothing, but since there aren't ever going to be any
> AVworkers at this time we should be explicitly skipping this. That
> should avoid misunderstanding the code and avoid any future side
> effects.

The code is trying to signal every child that exists. By that logic we
should have a lot more conditionals to try to avoid signaling process
that "shouldn't" exist in the current PM state --- eg, the following
line where the AV launcher is signaled. I don't think it's going to
be an improvement in either readability or robustness.

regards, tom lane

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