From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, pgsql-committers(at)postgresql(dot)org |
Subject: | Re: pgsql-server/ /configure /configure.in rc/incl ... |
Date: | 2003-03-06 04:33:36 |
Message-ID: | 200303060433.h264XaQ11718@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-committers pgsql-performance |
I assume he just assumed poll() actually polls. I doesn't. It is just
like select().
---------------------------------------------------------------------------
Tom Lane wrote:
> "Christopher Kings-Lynne" <chriskl(at)familyhealth(dot)com(dot)au> writes:
> >>> Has anyone ever thought about adding kqueue (for *BSD) support to
> >>> Postgres, instead of using select?
> >>
> >> Why? poll() is standard. kqueue isn't, AFAIK.
>
> > It's supposed be a whole heap faster - there is no polling involved...
>
> Supposed by whom? Faster than what? And how would it not poll?
>
> The way libpq uses this call, it's either probing for current status
> (timeout=0) or it's willing to block, possibly indefinitely, until the
> desired condition arises. It does not sit there in a busy-wait loop.
> I can't see any reason to think that an OS-specific API would give
> any marked difference in performance.
>
> regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
> subscribe-nomail command to majordomo(at)postgresql(dot)org so that your
> message can get through to the mailing list cleanly
>
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
From | Date | Subject | |
---|---|---|---|
Next Message | Sean Chittenden | 2003-03-06 09:41:17 | Re: pgsql-server/ /configure /configure.in rc/incl ... |
Previous Message | Tom Lane | 2003-03-06 04:19:16 | Re: pgsql-server/ /configure /configure.in rc/incl ... |
From | Date | Subject | |
---|---|---|---|
Next Message | Shridhar Daithankar | 2003-03-06 06:53:42 | Re: Batch copying of databases |
Previous Message | Tom Lane | 2003-03-06 04:19:16 | Re: pgsql-server/ /configure /configure.in rc/incl ... |