Re: Performance issue with Insert

Hi ,

This server is the dedicated database server.

And I am testing the limit for the concurrent active users. When I am
running my test for 400 concurrent user ie. Active connection. I am getting
good performance but when I am running the same the same test for 950
concurrent users I am getting very bad performance.

>> Scenario : All insert are waiting for previous insert to complete.

I don’t know whether it is the same session or different session.

DB id huge but Triggers are not touching the whole database.

I’ll provide the result set of vmstat and iostat tomorrow.

--
Thanks & regards,
JENISH VYAS

On Mon, Jun 27, 2011 at 10:48 PM, Tomas Vondra <tv(at)fuzzy(dot)cz> wrote:

> Dne 27.6.2011 17:01, Jenish napsal(a):
> > Hi,
> >
> > DB : POSTGRES 8.4.8
> > OS : Debian
> > HD : SAS 10k rpm
> >
> > Shared_buffer is 4096 25 % of RAM , effective_cache is 8GB 75% of RAM
>
> How much data are we talking about? Does that fit into the shared
> buffers or is it significantly larger? Do the triggers touch the whole
> database or just a small part of it (active part)?
>
> regards
> Tomas
>
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