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Re: NOTIFY command impact

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> On Feb 21, 2017, at 6:03 PM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
> 
> Rob Brucks <rob.brucks@xxxxxxxxxxxxx> writes:
>> If a notify is sent and then PG is immediately shut down, wouldn't PG want to save that message for processing after startup?
>> Or is the message just discarded?
> 
> NOTIFY data is not saved across a shutdown or crash.
> 
> (The reason it goes into the WAL stream is so that you can have listeners
> on replication slaves, not for recovery purposes.)
> 
>            regards, tom lane
> 

Are we sure that replication slaves can have listeners? When I tried it on 9.4.10, I got the following message:

"ERROR: cannot execute LISTEN during recovery"

-=Frank


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