On Thu, Jun 22, 2017 at 7:19 PM, Thomas Munro <thomas.mu...@enterprisedb.com> wrote: > I don't plan to resubmit this patch myself, but I was doing some > spring cleaning and rebasing today and I figured it might be worth > quietly leaving a working patch here just in case anyone from the > various BSD communities is interested in taking the idea further.
Since there was a mention of kqueue on -hackers today, here's another
rebase. I got curious just now and ran a very quick test on an AWS 64
vCPU m4.16xlarge instance running image "FreeBSD
11.1-STABLE-amd64-2017-08-08 - ami-00608178". I set shared_buffers =
10GB and ran pgbench approximately the same way Heikki and Keith did
upthread:
pgbench -i -s 200 postgres
pgbench -M prepared -j 6 -c 6 -S postgres -T60 -P1
pgbench -M prepared -j 12 -c 12 -S postgres -T60 -P1
pgbench -M prepared -j 24 -c 24 -S postgres -T60 -P1
pgbench -M prepared -j 36 -c 36 -S postgres -T60 -P1
pgbench -M prepared -j 48 -c 48 -S postgres -T60 -P1
The TPS numbers I got (including connections establishing) were:
clients master patched
6 146,215 147,535 (+0.9%)
12 273,056 280,505 (+2.7%)
24 360,751 369,965 (+2.5%)
36 413,147 420,769 (+1.8%)
48 416,189 444,537 (+6.8%)
The patch appears to be doing something positive on this particular
system and that effect was stable over a few runs.
--
Thomas Munro
http://www.enterprisedb.com
kqueue-v8.patch
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