Re: PG 13 release notes, first draft

On Thu, May 14, 2020 at 09:51:41AM +0900, Kyotaro Horiguchi wrote:
> At Wed, 13 May 2020 11:15:18 -0400, Bruce Momjian <bruce@momjian.us> wrote in 
> > On Wed, May 13, 2020 at 11:56:33AM +0900, Kyotaro Horiguchi wrote:
> It is just an more accurate (not an detailed) version of the
> previously proposed description.  If we simplify that, I choose to
> remove explanation on wal_skip_threshold.
> 
> How about this?
> 
> WAL-logging is now skipped while all kinds of bulk-insertion, then
> relations are sync'ed to disk at commit.  Previously this was done
> only for COPY operations, but the implementation had a bug that could
> cause data loss during crash recovery.

OK, I went with this text, stating WAL "generation" is skipped:

    Allow skipping of WAL for full table writes if wal_level is 'minimal'
    (Kyotaro Horiguchi)
    
    Relations larger than wal_skip_threshold will have their files
    fsync'ed rather than generating WAL.  Previously this was done
    only for COPY operations, but the implementation had a bug that
    could cause data loss during crash recovery.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EnterpriseDB                             https://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +