| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Peter Geoghegan <pg(at)heroku(dot)com>, Claudio Freire <klaussfreire(at)gmail(dot)com>, "David E(dot) Wheeler" <david(at)justatheory(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Jan Wieck <jan(at)wi3ck(dot)info> |
| Subject: | Re: open items for 9.4 |
| Date: | 2014-09-29 20:16:38 |
| Message-ID: | 10618.1412021798@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> On 2014-09-29 14:44:42 -0400, Tom Lane wrote:
>> Personally I think a hardwired #define should be plenty. What's the
>> argument that users will need to tune this at runtime?
> That right now it can make quite noticeable differences in
> scalability. And we have not much data to justify 8 as the default. And
> that's surely not going to change if we require recompiles.
I wonder why it's a fixed constant at all, and not something like
"wal_buffers / 8".
regards, tom lane
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