Re: write barrier question

I am. I was giving mean numbers

On Wed, Aug 18, 2010 at 12:56 PM, Craig James
<craig_james(at)emolecules(dot)com> wrote:
> On 8/18/10 12:24 PM, Samuel Gendler wrote:
>>
>> With barriers off, I saw a transaction rate of about 1200.  With
>> barriers on, it was closer to 1050.  The test had a concurrency of 40
>> in both cases.
>
> I discovered there is roughly 10-20% "noise" in pgbench results after
> running the exact same test over a 24-hour period on a machine with no other
> activity.  Be sure you run your tests enough times to get good statistics
> unless you're looking at much larger differences.
>
> Craig
>
> --
> Sent via pgsql-performance mailing list (pgsql-performance(at)postgresql(dot)org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-performance
>