| From: | Amit Langote <amitlangote09(at)gmail(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Magnus Hagander <magnus(at)hagander(dot)net>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: proposal: Set effective_cache_size to greater of .conf value, shared_buffers |
| Date: | 2014-05-15 13:23:19 |
| Message-ID: | CA+HiwqHapvMCjTfunY7apiVK4s+j69xz2NkMdXuFOSK-f_OPrQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, May 15, 2014 at 9:06 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>
> This is the same problem we had with auto-tuning work_mem, in that we
> didn't know what other concurrent activity was happening. Seems we need
> concurrent activity detection before auto-tuning work_mem and
> effective_cache_size.
>
Perhaps I am missing something obvious here, but would mmgr have any
useful numbers on this? Like any book-keeping info maintained by
mcxt.c/aset.c? Would extending that interface help?
--
Amit
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