Re: Moving more work outside WALInsertLock - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Moving more work outside WALInsertLock
Date
Msg-id 6113.1323963295@sss.pgh.pa.us
Whole thread Raw
In response to Moving more work outside WALInsertLock  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Responses Re: Moving more work outside WALInsertLock  (Jeff Janes <jeff.janes@gmail.com>)
Re: Moving more work outside WALInsertLock  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
List pgsql-hackers
Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> writes:
> I've been experimenting with different approaches to do that, but one 
> thing is common among all of them: you need to know the total amount of 
> WAL space needed for the record, including backup blocks, before you 
> take the lock. So, here's a patch to move things around in XLogInsert() 
> a bit, to accomplish that.

This patch may or may not be useful, but this description of it is utter
nonsense, because we already do compute that before taking the lock.
Please try again to explain what you're doing?
        regards, tom lane


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