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Re: Vacuum of large tables causing replication delays to hot standby

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9.2.12

Sent from my iPhone

> On Apr 30, 2016, at 12:37 PM, Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
> 
> Jeff Mcdowell <Jeff.Mcdowell@xxxxxxxxxxxxxxx> writes:
>> 95% of the time, the delay is only microseconds. But we have discovered that whenever the master does an auto vacuum of a large table, the transaction replay delay can climb is high as 1 hour. These delays don’t seem to correlate with any particular queries that are running against the master or the standby, and the delay only subsides when the vacuum completes.
> 
> What PG version might this be?
> 
>            regards, tom lane


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