| From: | Curt Sampson <cjs(at)cynic(dot)net> |
|---|---|
| To: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au> |
| Cc: | Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: O_DIRECT in freebsd |
| Date: | 2003-06-17 10:34:50 |
| Message-ID: | Pine.NEB.4.51.0306171933200.408@angelic-vtfw.cvpn.cynic.net |
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| Thread: | |
| Lists: | pgsql-hackers |
On Tue, 17 Jun 2003, Christopher Kings-Lynne wrote:
> "A new DIRECTIO kernel option enables support for read operations that
> bypass the buffer cache and put data directly into a userland buffer....
>
> Will PostgreSQL pick this up automatically, or do we need to add extra
> checks?
You don't want it to. It's more efficent just to use mmap, because then
all the paging and caching issues are taken care of for you.
cjs
--
Curt Sampson <cjs(at)cynic(dot)net> +81 90 7737 2974 http://www.netbsd.org
Don't you know, in this new Dark Age, we're all light. --XTC
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