On Tue, Jan 18, 2022 at 1:52 PM Alvaro Herrera <alvhe...@alvh.no-ip.org> wrote: > > On 2022-Jan-18, James Coleman wrote: > > > Reading the code it seems the only usage (besides > > the boolean activation status also stored there) is in > > TransactionIdGetCommitTsData, and the only consumers of that in core > > appear to be the SQL callable functions to get the latest commit info. > > It is in commit_ts.h though, so I'm guessing someone is using this > > externally (and maybe that's why the feature has the shape it does). > > Logical replication is the intended consumer of that info, for the > purposes of conflict handling. I suppose pglogical uses it, but I don't > know that code myself. > > [ ... greps ... ] > > Yeah, that function is called from pglogical.
That's interesting, because my use case for the lsn is also logical replication (monitoring). James Coleman
