Over in the "Log notice that checkpoint is to be written on shutdown" thread...

On 10/16/14, 2:31 PM, Michael Banck wrote:
> There were some comments that this might not actually be the case and/or
> that the postmaster was simply waiting for clients to disconnect due to
> smart shutdown being invoked.

Something else mentioned was that once you start a smart shutdown you have no 
good way (other than limited ps output) to see what the shutdown is waiting on. 
I'd like to have some way to get back into the database to see what's going on. 
Perhaps we could allow superusers to connect while waiting for shutdown. A big 
warning that we're in shutdown would be nice, and maybe it would make sense to 
further restrict this to only local connections.

It would also be good to be able to abort a smart shutdown if you determine it 
was a bad idea. Perhaps that's an acceptable way to solve both problems: if 
your smart shutdown is hung, cancel it and connect to see what's going on.
--
Jim Nasby, Data Architect, Blue Treble Consulting
Data in Trouble? Get it in Treble! http://BlueTreble.com


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