Re: Speed up Clog Access by increasing CLOG buffers

On Thu, Apr 7, 2016 at 10:16 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> Hi,
>
> On 2016-04-07 09:14:00 +0530, Amit Kapila wrote:
> > On Sat, Apr 2, 2016 at 5:25 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>
wrote:
> > I have ran exactly same test on intel x86 m/c and the results are as
below:
>
> Thanks for running these tests!
>
> > Client Count/Patch_ver (tps) 2 128 256
> > HEAD – Commit 2143f5e1 2832 35001 26756
> > clog_buf_128 2909 50685 40998
> > clog_buf_128 +group_update_clog_v8 2981 53043 50779
> > clog_buf_128 +content_lock 2843 56261 54059
> > clog_buf_128 +nocontent_lock 2630 56554 54429
>
> Interesting.
>
> could you perhaps also run a test with -btpcb-like(at)1 -bselect-only(at)3?
>

This is the data with -b tpcb-like(at)1 with 20-min run for each version and I
could see almost similar results as the data posted in previous e-mail.

Client Count/Patch_ver (tps) 256
clog_buf_128 40617
clog_buf_128 +group_clog_v8 51137
clog_buf_128 +content_lock 54188

For -b select-only(at)3, I have done quicktest for each version and number is
same 62K~63K for all version, why do you think this will improve
select-only workload?

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