Re: log XLogPrefetch stats at end of recovery

Hi,

On Wed, Mar 18, 2026 at 12:18 AM Lakshmi N <lakshmin(dot)jhs(at)gmail(dot)com> wrote:

> Hi,
>
> While investigating a long recovery, I noticed that XLogPrefetch stats
> were not logged at the end of recovery. This log message will be useful to
> understand how effective XLogPrefetch was during recovery. Adding a patch
> to address this.
>

Applied this patch and validated the log message. This log message appears
to be useful to me, particularly while doing fleet wide analysis. I am
wondering if we can periodically log this in standby mode as well, not just
before promoting?

2026-03-20 23:33:13.756 PDT [2265441] LOG: XLogPrefetcher stats:
prefetch=14, hit=6, skip_init=5, skip_new=28, skip_fpw=18, skip_rep=996

Thanks,
Satya