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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: Petr Jelinek <petr.jelinek@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [COMMITTERS] pgsql: Use asynchronous connect API in libpqwalreceiver
Date: Fri, 17 Mar 2017 11:07:46 -0400
Message-ID: <10458.1489763266@sss.pgh.pa.us> (raw)
In-Reply-To: <34591606-976a-bbee-8eda-778c1e1fc52f@2ndQuadrant.com>
References: <E1cjo1g-0000mr-ST@gemulon.postgresql.org>
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	<34d98fbf-9195-04d2-b85a-634d6952ffdf@2ndquadrant.com>
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	<4144256b-dc4f-892c-a720-71f6e7b9ac87@2ndquadrant.com>
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	<e31d81e2-392a-dca0-a700-e28b583bd2d3@2ndQuadrant.com>
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Andrew Dunstan <andrew.dunstan@2ndquadrant.com> writes:
> I have confirmed on jacana Petr's observation that adding a timeout to
> the WaitLatchOrSocket cures the problem.

Does anyone have a theory as to why that cures the problem?

What length of timeout is being suggested here?  Would a long timeout
perhaps create a performance issue?  That is, I'm wondering if the
wait actually sleeps to the end of the timeout in the problem case(s).

			regards, tom lane


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