On 2024-Feb-23, Andrey M. Borodin wrote:
> I'm sure anyone with multiple CPUs should increase, not decrease
> previous default of 128 buffers (with 512MB shared buffers). Having
> more CPUs (the only way to benefit from more locks) implies bigger
> transaction buffers.
Sure.
> IMO making bank size variable adds unneeded computation overhead, bank
> search loops should be unrollable by compiler etc.
Makes sense.
> Originally there was a patch set step, that packed bank's page
> addresses together in one array. It was done to make bank search a
> SIMD instruction.
Ants Aasma had proposed a rework of the LRU code for better performance.
He told me it depended on bank size being 16, so you're right that it's
probably not a good idea to make it variable.
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Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/