Re: Implement waiting for wal lsn replay: reloaded

17.02.2025 00:27, Alexander Korotkov wrote:
> On Thu, Feb 6, 2025 at 10:31 AM Yura Sokolov <y(dot)sokolov(at)postgrespro(dot)ru> wrote:
>> I briefly looked into patch and have couple of minor remarks:
>>
>> 1. I don't like `palloc` in the `WaitLSNWakeup`. I believe it wont issue
>> problems, but still don't like it. I'd prefer to see local fixed array, say
>> of 16 elements, and loop around remaining function body acting in batch of
>> 16 wakeups. Doubtfully there will be more than 16 waiting clients often,
>> and even then it wont be much heavier than fetching all at once.
>
> OK, I've refactored this to use static array of 16 size. palloc() is
> used only if we don't fit static array.

I've rebased patch and:
- fixed compiler warning in wait.c ("maybe uninitialized 'result'").
- made a loop without call to palloc in WaitLSNWakeup. It is with "goto" to
keep indentation, perhaps `do {} while` would be better?

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regards
Yura Sokolov aka funny-falcon