On Fri, Oct 14, 2016 at 11:27 PM, Albe Laurenz <laurenz.albe@xxxxxxxxxx> wrote: > After a successful commit, the WAL file and its metadata are on disk. > Moreover, the file metadata won't change (except for the write and access > timestamps) because WAL files are created with their full size and never > extended, so no WAL file should ever get "lost" because of partial metadata > writes. This behavior depends as well on the value of wal_sync_method. For example with fdatasync the metadata is not flushed. It does not matter any for for WAL segments as Albe has already mentioned, but the choice here impacts performance. -- Michael -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
