| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> |
| Cc: | Anjan Dave <adave(at)vantage(dot)com>, Vivek Khera <vivek(at)khera(dot)org>, Postgresql Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: High context switches occurring |
| Date: | 2005-12-20 14:41:30 |
| Message-ID: | 28871.1135089690@sss.pgh.pa.us |
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| Lists: | pgsql-performance |
Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> writes:
> I see a very low performance and high context switches on our
> dual itanium2 slackware box (Linux ptah 2.6.14 #1 SMP)
> with 8Gb of RAM, running 8.1_STABLE. Any tips here ?
> postgres(at)ptah:~/cvs/8.1/pgsql/contrib/pgbench$ time pgbench -s 10 -c 10 -t 3000 pgbench
> starting vacuum...end.
> transaction type: TPC-B (sort of)
> scaling factor: 1
> number of clients: 10
You can't expect any different with more clients than scaling factor :-(.
Note that -s is only effective when supplied with -i; it's basically
ignored during an actual test run.
regards, tom lane
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