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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Васильев Дмитрий <d.vasilyev@postgrespro.ru>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Performance degradation in commit ac1d794
Date: Thu, 14 Jan 2016 10:46:00 -0500
Message-ID: <29091.1452786360@sss.pgh.pa.us> (raw)
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Robert Haas <robertmhaas@gmail.com> writes:
> Incidentally, if we're going to whack around the latch API, it would
> be nice to pick a design which wouldn't be too hard to extend to
> waiting on multiple sockets.  The application I have in mind is to
> send of queries to several foreign servers at once and then wait until
> bytes come back from any of them.  It's mostly pie in the sky at this
> point, but it seems highly likely to me that we'd want to do such a
> thing by waiting for bytes from any of the sockets involved OR a latch
> event.

Instead of SetSocketToWaitOn, maybe AddSocketToWaitSet and
RemoveSocketFromWaitSet?  And you'd need some way of identifying
which socket came ready after a wait call...

			regards, tom lane


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