when is useful min_wal_size?

On Thu, 2021-02-04 at 12:41 +0100, Luca Ferrari wrote:

this may sound trivial, but in my opinion min_wal_size is useful only
when the cluster is initialized or the wals are reset.
Am I wrong?

The amount of WAL that PostgreSQL pre-creates for future use
depends on the database activity but has a lower limit of "min_wal_size".

If your workload is subject to long lulls followed by activity spikes,
raising "min_wal_size" can improve the performance at the beginning
of an activity spike.

Yours,
Laurenz Albe
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