| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com>, "Gokulakannan Somasundaram" <gokul007(at)gmail(dot)com>, <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Improving the Performance of Full Table Updates |
| Date: | 2007-10-08 15:19:11 |
| Message-ID: | 87odf963dc.fsf@oxford.xeocode.com |
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| Lists: | pgsql-hackers |
"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> writes:
>> * mmap the WAL segments, instead of using the slru buffers.
>
> This one's almost certainly a nonstarter, for lack of any portable way
> to control when writes happen.
I think mlock and msync(MS_SYNC) ought to be enough. I'm not sure every OS
implements them as specified though.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
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