| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com> |
| Subject: | Re: Wait free LW_SHARED acquisition - v0.9 |
| Date: | 2014-10-11 13:10:45 |
| Message-ID: | 20141011131045.GC18020@awork2.anarazel.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 2014-10-11 07:26:57 +0530, Amit Kapila wrote:
> On Sat, Oct 11, 2014 at 7:00 AM, Andres Freund <andres(at)2ndquadrant(dot)com>
> > And since
> > your general performance numbers are a fair bit lower than what I see
> > with, hopefully, the same code on the same machine...
>
> You have reported numbers at 1000 scale factor and mine were
> at 3000 scale factor, so I think the difference is expected.
The numbers for 3000 show pretty much the same:
SCALE 128 160 175
HEAD 352113 339005 336491
LW_SHARED 365874 347931 342528
Hm. I wonder if you're using pgbench without -M prepared? That'd about
explain the difference.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Michael Paquier | 2014-10-11 13:32:15 | Re: Add CREATE support to event triggers |
| Previous Message | Peter Eisentraut | 2014-10-11 13:07:46 | Re: orangutan seizes up during isolation-check |