From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Subject: Re: hyrax vs. RelationBuildPartitionDesc
Date: Wed, 13 Mar 2019 13:30:52 -0400
Message-ID: <7961.1552498252@sss.pgh.pa.us> (raw)
In-Reply-To: <7448.1552497345@sss.pgh.pa.us>
References: <CA+TgmoY3bRmGB6-DUnoVy5fJoreiBJ43rwMrQRCdPXuKt4Ykaw@mail.gmail.com>
<20190313164232.GA5270@alvherre.pgsql>
<CA+Tgmoabw8KW9rx6ThnUTR_ofJC8GwVaC+XMe7HkZvsG7J1rvA@mail.gmail.com>
<7448.1552497345@sss.pgh.pa.us>
I wrote:
> I recall having noticed someplace where I thought the relcache partition
> support was simply failing to make provisions for cleaning up a cached
> structure at relcache entry drop, but I didn't have time to pursue it
> right then. Let me see if I can reconstruct what I was worried about.
Ah, here we are: it was rel->rd_partcheck. I'm not sure exactly how
complicated that structure can be, but I'm pretty sure that this is
a laughably inadequate method of cleaning it up:
if (relation->rd_partcheck)
pfree(relation->rd_partcheck);
Having it be loose data in CacheMemoryContext, which is the current state
of affairs, is just not going to be practical to clean up. I suggest that
maybe it could be copied into rd_partkeycxt or rd_pdcxt, so that it'd go
away as a byproduct of freeing those. If there's a reason it has to be
independent of both, it'll have to have its own small context.
Dunno if that's related to hyrax's issue, though.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, robertmhaas@gmail.com, alvherre@2ndquadrant.com, pgsql-hackers@lists.postgresql.org
Subject: Re: hyrax vs. RelationBuildPartitionDesc
In-Reply-To: <7961.1552498252@sss.pgh.pa.us>
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