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Re: testing HS/SR - 1 vs 2 performance

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Erik Rijkers <er(at)xs4all(dot)nl>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: testing HS/SR - 1 vs 2 performance
Date: 2010-04-25 16:43:57
Message-ID: 3963.1272213837@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers 
Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> [ v2 patch ]

BTW, while I'm looking at this, why bother with the separate
KnownAssignedXidsValid[] array?  Wouldn't it be cheaper
(certainly so in storage, probably so in access/update times)
to have just the KnownAssignedXids[] array and store
InvalidTransactionId in unused entries?

			regards, tom lane

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Subject: Re: testing HS/SR - 1 vs 2 performance
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