On Tue, Mar 29, 2022 5:15 PM Hou, Zhijie/侯 志杰 <houzj.fnst@fujitsu.com> wrote:
>
> Thanks for the comment.
> Attach the new version patch with this change.
>
Hi,
I did a performance test for this patch to see if it affects performance when
publishing empty transactions, based on the v32 patch.
In this test, I use synchronous logical replication, and publish a table with no
operations on it. The test uses pgbench, each run takes 15 minutes, and I take
median of 3 runs. Drop and recreate db after each run.
The results are as follows, and attach the bar chart. The details of the test is
also attached.
TPS - publishing empty transactions (scale factor 1)
--------------------------------------------------------------------
4 threads 8 threads 16 threads
HEAD 4818.2837 4353.6243 3888.5995
patched 5111.2936 4555.1629 4024.4286
TPS - publishing empty transactions (scale factor 100)
--------------------------------------------------------------------
4 threads 8 threads 16 threads
HEAD 9066.6465 16118.0453 21485.1207
patched 9357.3361 16638.6409 24503.6829
There is an improvement of more than 3% after applying this patch, and in the
best case, it improves by 14%, which looks good to me.
Regards,
Shi yu
