Re: Final Thoughts for 8.3 on LWLocking and Scalability

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Final Thoughts for 8.3 on LWLocking and Scalability
Date: 2007-09-11 14:21:49
Message-ID: 27926.1189520509@sss.pgh.pa.us
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Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> 1. The ProcArrayLock is acquired Exclusive-ly by only one remaining
> operation: XidCacheRemoveRunningXids(). Reducing things to that level is
> brilliant work, Florian and Tom.

It would be brilliant if it were true, but it isn't. Better look again.

regards, tom lane

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