From: | Stephen Frost <sfrost(at)snowman(dot)net> |
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To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Memory leaks in record_out and record_send |
Date: | 2012-11-13 22:50:08 |
Message-ID: | 20121113225008.GB5162@tamriel.snowman.net |
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Lists: | pgsql-hackers |
* Robert Haas (robertmhaas(at)gmail(dot)com) wrote:
> Yeah. The thing that concerns me is that I think we have a pretty
> decent number of memory contexts where the expected number of
> allocations is very small ... and we have the context *just in case*
> we do more than that in certain instances. I've seen profiles where
> the setup/teardown costs of memory contexts are significant ... which
> doesn't mean that those examples would perform better with fewer
> memory contexts, but it's enough to make me pause for thought.
So, for my 2c, I'm on the other side of this, personally. We have
memory contexts for more-or-less exactly this issue. It's one of the
great things about PG- it's resiliant and very unlikely to have large or
bad memory leaks in general, much of which can, imv, be attributed to
our use of memory contexts.
Thanks,
Stephen
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