| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> |
| Cc: | Greg Stark <stark(at)mit(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Clock sweep not caching enough B-Tree leaf pages? |
| Date: | 2015-04-21 21:52:01 |
| Message-ID: | CA+TgmobzYr6x3LE839mUmWgZ9PWD+6qieajO2C269d+-0B=8og@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Apr 20, 2015 at 2:53 PM, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com> wrote:
> I think that would help, but it still leaves user backends trying to advance
> the clock, which is quite painful. Has anyone tested running the clock in
> the background? We need a wiki page with all the ideas that have been tested
> around buffer management...
Amit's bgreclaimer patch did that, but we weren't able to demonstrate
a clear benefit. I haven't given up on the idea yet, but we've got to
be able to prove that it's a good idea in practice as well as in
theory.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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