From: | Andres Freund <andres(at)anarazel(dot)de> |
---|---|
To: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
Cc: | Noah Misch <noah(at)leadboat(dot)com>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
Subject: | Re: Perf Benchmarking and regression. |
Date: | 2016-06-10 00:37:55 |
Message-ID: | 20160610003755.mwc7dvvnymqmfypc@alap3.anarazel.de |
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Lists: | pgsql-hackers |
On 2016-06-10 09:34:33 +0900, Michael Paquier wrote:
> On Fri, Jun 10, 2016 at 9:19 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> > On 2016-06-09 14:37:31 -0700, Andres Freund wrote:
> >> I'm writing a patch right now, planning to post it later today, commit
> >> it tomorrow.
> >
> > Attached.
>
> - /* see bufmgr.h: OS dependent default */
> - DEFAULT_BACKEND_FLUSH_AFTER, 0, WRITEBACK_MAX_PENDING_FLUSHES,
> + 0, 0, WRITEBACK_MAX_PENDING_FLUSHES,
> Wouldn't it be better to still use LT_BACKEND_FLUSH_AFTER here, and
> just enforce it to 0 for all the OSes at the top of bufmgr.h?
What would be the point? The only reason for DEFAULT_BACKEND_FLUSH_AFTER
was that it differed between operating systems. Now it doesn't anymore.
Andres
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