Re: Declarative partitioning optimization for large amount of partitions

Hi Aleksander,

On 2017/03/07 0:22, Aleksander Alekseev wrote:
> Hello.
>
> OK, here is a patch.
>
> Benchmark, before:
>
> ```
> number of transactions actually processed: 1823
> latency average = 1153.495 ms
> latency stddev = 154.366 ms
> tps = 6.061104 (including connections establishing)
> tps = 6.061211 (excluding connections establishing)
> ```
>
> Benchmark, after:
>
> ```
> number of transactions actually processed: 2462
> latency average = 853.862 ms
> latency stddev = 112.270 ms
> tps = 8.191861 (including connections establishing)
> tps = 8.192028 (excluding connections establishing)
> ```
>
> +35% TPS, just as expected. Feel free to run your own benchmarks on
> different datasets and workloads. `perf top` shows that first bottleneck
> is completely eliminated.

That seems like a good gain.

> I did nothing about the second bottleneck
> since as Amit mentioned partition-pruning should solve this anyway and
> apparently any micro-optimizations don't worth an effort.

Sorry, I didn't mean to dissuade you from trying those
micro-optimizations. If general inheritance cases can benefit from it
(which, until we have a different method, will be used by partitioned
tables as well), I think we should try it.

Thanks,
Amit