On 7/23/25 02:59, Andres Freund wrote:
> Hi,
>
> On 2025-07-23 02:50:04 +0200, Tomas Vondra wrote:
>> But I don't see why would this have any effect on the prefetch distance,
>> queue depth etc. Or why decreasing INDEX_SCAN_MAX_BATCHES should improve
>> that. I'd have expected exactly the opposite behavior.
>>
>> Could be bug, of course. But it'd be helpful to see the dataset/query.
>
> Pgbench scale 500, with the simpler query from my message.
>
With direct I/O, I guess? I'll take a look tomorrow.
regard
--
Tomas Vondra
