| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Protect syscache from bloating with negative cache entries |
| Date: | 2017-01-13 23:06:31 |
| Message-ID: | 20170113230631.uuq3ioq2qlyjio5q@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2017-01-13 17:58:41 -0500, Tom Lane wrote:
> But, again, the catcache isn't the only source of per-process bloat
> and I'm not even sure it's the main one. A more holistic approach
> might be called for.
It'd be helpful if we'd find a way to make it easy to get statistics
about the size of various caches in production systems. Right now that's
kinda hard, resulting in us having to make a lot of guesses...
Andres
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