> I argue that having S partitions is better in several different ways.
>
> a. Concurrency of LW_EXCLUSIVE
> b. Reduced contention on LWLockWaitListLock
> c. Reduced CAS iterations in LWLockAtttemptLock
> d. Reduced waits (that implies wait list access and sleeping)
In theory this has benefits with no compromises.
In practice, it is more impactful than I initially expected.
I thought it would be noticeable only in large scale systems, but even on my
lightweight laptop with 8 cores the results are measurable.
With 128 partitions
clients base patched
1 26371.6 26149.2
8 35659.7 44958.5 +26.1%
Regards,
Alexandre
