Re: [HACKERS] Patch for Prevent pg_dump/pg_restore from being affected by statement_timeout

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: daveg <daveg(at)sonic(dot)net>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Alex Hunsaker <badalex(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Pg Patches <pgsql-patches(at)postgresql(dot)org>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Greg Sabino Mullane <greg(at)turnstep(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [HACKERS] Patch for Prevent pg_dump/pg_restore from being affected by statement_timeout
Date: 2008-06-24 21:34:50
Message-ID: 6596.1214343290@sss.pgh.pa.us
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daveg <daveg(at)sonic(dot)net> writes:
> lock-timeout sets statement_timeout to a small value while locks are being
> taken on all the tables. Then it resets it to default. So it could reset it
> to whatever the new default is.

"reset to default" is *surely* not the right behavior; resetting to the
setting that had been in effect might be a bit sane. But the whole
design sounds pretty broken to start with. The timer management code
already understands the concept of scheduling the interrupt for the
nearest of a couple of potentially active timeouts. ISTM any patch
intended to add a feature like this ought to extend that logic rather
than hack around changing the values of global variables.

regards, tom lane

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