Re: [proposal] recovery_target "latest"

On 2019-11-08 05:00, Grigory Smolkin wrote:
> Attached new patch revision, now end of available WAL is defined as the
> fact of missing required WAL.
> In case of standby, the end of WAL is defined as 2 consecutive switches
> of WAL source, that didn`t provided requested record.
> In case of streaming standby, each switch of WAL source is forced after
> 3 failed attempts to get new data from walreceiver.
> 
> All constants are taken off the top of my head and serves as proof of
> concept.

Well, this is now changing the meaning of the patch quite a bit.  I'm on 
board with making the existing default behavior explicit.  (This is 
similar to how we added recovery_target_timeline = 'current' in PG12.) 
Still not a fan of the name yet, but that's trivial.

If, however, you want to change the default behavior or introduce a new 
behavior, as you are suggesting here, that should be a separate discussion.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services