Re: postgres hot-standby questions.

On Mar 26, 2015, at 12:17 PM, Graeme B. Bell <grb@skogoglandskap.no> wrote:
>
> ...I won't be able to directly apply the (promoted) standby's new WAL entries over the top of it.

I see--there's our difference. When I do this, I am willing to stay on the standby for a while if need be.

> A checkpoint or autovacuum might generate a small change/entry in WAL (I don't know this for sure regarding
autovacuum;this is a worst case assumption). 

I would think autovacuum would have to, since it writes some changes to at least index pages.

> Let's imagine someone follows your advice but is already running a PITR archive with archive_timeout. The recommended
timeoutis 1 minute. Every minute their server generates a new WAL segment.  

Yeah, I'm always assuming streaming replication. If you know you have a delay in replication, you'd better remember
that;-) 

--
Scott Ribe
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