Michael Renner wrote: > Bruce Momjian wrote: > > Michael Renner wrote: > >> Hi, > >> > >> this is a small update to the first paragraph of the WAL configuration > >> chapter, going into more detail WRT redo vs. checkpoint records, since > >> the underlying behavior is currently only deducible from the source. I'm > >> not perfectly sure if I got everything right, so feel free to change as > >> necessary. > > [..] > > > I read over you patch and I was afraid it was trying to put too much > > information into a single paragraph, so I added a second paragraph that > > just talks about checkpoint smoothing. I did not address the issue of > > when the REDO WAL entry is written --- that is probably too much detail > > for our documentation. > > Too bad, understanding how this works is necessary to properly implement > more complex log shipping setups. Maybe /backend/access/transam/README > instead? Or specific "under the hood" paragraphs for selected areas of > the DBMS?
Let's back up and let me ask why it is important for a user to know when the REDO record is written vs. when the checkpoint completes, and how that affects more complex log shipping setups. This detail is certainly appropriate for /backend/access/transam/README so if you could send in a patch, that would be great. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + If your life is a hard drive, Christ can be your backup. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
