On Fri, 2 Apr 2021 08:22:09 -0400 Robert Haas <robertmh...@gmail.com> wrote:
> On Fri, Apr 2, 2021 at 4:23 AM SATYANARAYANA NARLAPURAM > <satyanarlapu...@gmail.com> wrote: > > Why pg_walfile_name() can't be executed under recovery? > > I believe the issue is that the backend executing the function might > not have an accurate idea about which TLI to use. But I don't > understand why we can't find some solution to that problem. > > > What is the best way for me to get the current timeline and/or the file > > being recovering on the standby using a postgres query? I know I can get it > > via process title but don't want to go that route. > > pg_stat_wal_receiver has LSN and TLI information, but probably won't > help except when WAL receiver is actually active. > pg_last_wal_receive_lsn() and pg_last_wal_replay_lsn() will give the > LSN at any point during recovery, but not the TLI. We might have some > gaps in this area... Yep, see previous discussion: https://www.postgresql.org/message-id/flat/20190723180518.635ac554%40firost The status by the time was to consider a new view eg. pg_stat_recovery, to report various recovery stats. But maybe the best place now would be to include it in the new pg_stat_wal view? As I'm interesting with this feature as well, I volunteer to work on it as author or reviewer. Regards,
