On Wed, Dec 21, 2016 at 4:28 PM, Andres Freund <andres@anarazel.de> wrote:
> - Similarly I don't like the name "progress LSN" much. What does
> "progress" really mean in that". Maybe "consistency LSN"?
Whoa. -1 from me for "consistency LSN". Consistency has to with
whether the cluster has recovered up to the minimum recovery point or
whatever -- that is -- questions like "am i going to run into torn
pages?" and "should I expect some heap tuples to maybe be missing
index tuples, or the other way around?". What I think "progress LSN"
is getting at -- actually fairly well -- is whether we're getting
anything *important* done, not whether we are consistent. I don't
mind changing the name, but not to consistency LSN.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company