Re: Streaming read-ready sequential scan code - Mailing list pgsql-hackers

From Thomas Munro
Subject Re: Streaming read-ready sequential scan code
Date
Msg-id CA+hUKG+4nJHGau4H9yDjJ8XETqXOxkU3qNumgJkaPsyV9aV2KA@mail.gmail.com
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In response to Re: Streaming read-ready sequential scan code  (Alexander Lakhin <exclusion@gmail.com>)
List pgsql-hackers
On Fri, Aug 30, 2024 at 1:00 AM Alexander Lakhin <exclusion@gmail.com> wrote:
> I looked at two perf profiles of such out-of-sync processes and found no
> extra calls or whatsoever in the slow one, it just has the number of perf
> samples increased proportionally. It made me suspect CPU frequency
> scaling... Indeed, with the "performance" governor set and the boost mode
> disabled, I'm now seeing much more stable numbers (I do this tuning before
> running performance tests, but I had forgotten about that when I ran that
> your test, my bad).

Aha, mystery solved.

I have pushed the fix.  Thanks!



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