Tom Lane wrote:
>>This small patch improves the performance of INSERT and UPDATE. By my
>>machine, these changes raised the performance about 5%~10% in pgbench.
>
> BTW, in profiling the backend I've never seen PageAddItem take more than
> about 1% of the runtime, and in pgbench in particular it seems to be
> down around 0.1% ... so the above seems a bit optimistic ...
I have the nearly same result, but pgbench says different. I don't know
why my test generates 5~10% performance improvement. Therefore, I want
to take a benchmark in a reliable environment.
By reference, PageAddItem takes 4%~5% of the runtime in the heavy
writing operation likes CREATE TABLE AS SELECT.
--
Hiroki Kataoka <kataoka@interwiz.jp>