Re: speeding up planning with partitions

Imai-san,

On 2019/03/20 11:21, Imai, Yoshikazu wrote:
> (4)
> We expect the performance does not depend on the number of partitions after applying all patches, if possible.
> 
> num of part    TPS
> -----------  -----
> 1024         7,257 (7274, 7246, 7252)
> 2048         6,718 (6627, 6780, 6747)
> 4096         6,472 (6434, 6565, 6416) (quoted from above (3)'s results)
> 8192         6,008 (6018, 5999, 6007)
> 
> It seems the performance still depend on the number of partitions. At the moment, I don't have any idea what cause
thisproblem but can we improve this more?
 

I've noticed [1] this kind of degradation when the server is built with
Asserts enabled.  Did you?

Thanks,
Amit

[1]
https://www.postgresql.org/message-id/a49372b6-c044-4ac8-84ea-90ad18b1770d%40lab.ntt.co.jp