Re: XMin Hot Standby Feedback patch - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: XMin Hot Standby Feedback patch
Date
Msg-id 4D5AAFBE.7040403@enterprisedb.com
Whole thread Raw
In response to Re: XMin Hot Standby Feedback patch  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
On 15.02.2011 18:52, Robert Haas wrote:
> On Tue, Feb 15, 2011 at 11:49 AM, Heikki Linnakangas
> <heikki.linnakangas@enterprisedb.com>  wrote:
>> It would be wise to also transmit the epoch in addition to xmin, to avoid
>> confusion if the standby is>  2 billion transactions behind.
>
> That case is probably hopelessly broken anyway.

I don't expect the feedback to do anything too useful in case of xid 
wraparound, but at least the master would recognize the situation and 
know to ignore the bogus xmin from that standby.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com


pgsql-hackers by date:

Previous
From: Robert Haas
Date:
Subject: Re: XMin Hot Standby Feedback patch
Next
From: Andrew Dunstan
Date:
Subject: Re: Add support for logging the current role