Re: Scaling shared buffer eviction

On Wed, Sep 3, 2014 at 9:45 AM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> On Thu, Aug 28, 2014 at 4:41 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
wrote:
> >
> > I have yet to collect data under varying loads, however I have
> > collected performance data for 8GB shared buffers which shows
> > reasonably good performance and scalability.
> >
> > I think the main part left for this patch is more data for various loads
> > which I will share in next few days, however I think patch is ready for
> > next round of review, so I will mark it as Needs Review.
>
> I have collected more data with the patch. I understand that you
> have given more review comments due to which patch require
> changes, however I think it will not effect the performance data
> to a great extent and I have anyway taken the data, so sharing the
> same.
>
>
> > Performance Data:
> > -------------------------------
> >
> > Configuration and Db Details
> > IBM POWER-7 16 cores, 64 hardware threads
> > RAM = 64GB
> > Database Locale =C
> > checkpoint_segments=256
> > checkpoint_timeout =15min
> > scale factor = 3000
> > Client Count = number of concurrent sessions and threads (ex. -c 8 -j 8)
> > Duration of each individual run = 5mins
> >
> > All the data is in tps and taken using pgbench read-only load
>
> Common configuration remains same as above.

Forgot to mention that data is a median of 3 runs and attached
sheet contains data for individual runs.

With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com