| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Trond Myklebust <trondmy(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Kevin Grittner <kgrittn(at)ymail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Joshua Drake <jd(at)commandprompt(dot)com>, Mel Gorman <mgorman(at)suse(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "lsf-pc(at)lists(dot)linux-foundation(dot)org" <lsf-pc(at)lists(dot)linux-foundation(dot)org>, Magnus Hagander <magnus(at)hagander(dot)net> |
| Subject: | Re: [Lsf-pc] Linux kernel impact on PostgreSQL performance |
| Date: | 2014-01-13 21:03:24 |
| Message-ID: | CA+TgmoZqA4wiqeZ_WR9Naf09dnObVQ6-204+vKuyAUtbi1Ei+A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Jan 13, 2014 at 3:53 PM, Trond Myklebust <trondmy(at)gmail(dot)com> wrote:
> O_DIRECT was specifically designed to solve the problem of double buffering between applications and the kernel. Why are you not able to use that in these situations?
O_DIRECT was apparently designed by a deranged monkey on some serious
mind-controlling substances. But don't take it from me, I have it on
good authority:
http://yarchive.net/comp/linux/o_direct.html
One might even say the best authority.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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