| From: | Matteo Beccati <php(at)beccati(dot)com> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Mateusz Guzik <mjguzik(at)gmail(dot)com> |
| Cc: | Keith Fiske <keith(at)omniti(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Marko Tiikkaja <marko(at)joh(dot)to>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Noah Misch <noah(at)leadboat(dot)com> |
| Subject: | Re: [HACKERS] kqueue |
| Date: | 2018-09-28 07:01:26 |
| Message-ID: | 873c5384-db1e-ef23-95e3-5520a66f3153@beccati.com |
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| Lists: | pgsql-hackers |
Hi Thomas,
On 28/09/2018 00:55, Thomas Munro wrote:
> I would like to commit this patch for PostgreSQL 12, based on this
> report. We know it helps performance on macOS developer machines and
> big FreeBSD servers, and it is the right kernel interface for the job
> on principle. Matteo Beccati reported a 5-10% performance drop on a
> low-end Celeron NetBSD box which we have no explanation for, and we
> have no reports from server-class machines on that OS -- so perhaps we
> (or the NetBSD port?) should consider building with WAIT_USE_POLL on
> NetBSD until someone can figure out what needs to be fixed there
> (possibly on the NetBSD side)?
Thanks for keeping me in the loop.
Out of curiosity (and time permitting) I'll try to spin up a NetBSD 8 VM
and run some benchmarks, but I guess we should leave it up to the pkgsrc
people to eventually change the build flags.
Cheers
--
Matteo Beccati
Development & Consulting - http://www.beccati.com/
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