Re: Clarify old WAL files cannot be removed until they are summarized

On Fri, Oct 18, 2024 at 02:25:15AM +0900, Fujii Masao wrote:
> The documentation in wal.sgml explains that old WAL files cannot be
> removed or recycled until they are archived (when WAL archiving is used)
> or replicated (when using replication slots). However, it did not
> mention that, similarly, old WAL files are also kept until they are summarized
> if WAL summarization is enabled. Attached patch adds that clarification to
> the documentation. Thought?
>
> @@ -643,6 +643,8 @@
> until the situation is resolved. A slow or failed standby server that
> uses a replication slot will have the same effect (see
> <xref linkend="streaming-replication-slots"/>).
> + Similarly, if WAL summarization is enabled, old segments are kept
> + until they are summarized.
> </para>

Sounds like a good idea to me. I'd suggest to add a link to
runtime-config-wal-summarization as it is the first reference to WAL
summarization in this file.
--
Michael