Re: HOT patch - version 15

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>
Cc: Gregory Stark <stark(at)enterprisedb(dot)com>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Florian Pflug <fgp(dot)phlo(dot)org(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: HOT patch - version 15
Date: 2007-09-11 04:42:38
Message-ID: 200709110442.l8B4gc322476@momjian.us
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Pavan Deolasee wrote:
> IMHO we are making full circles here. We have already tried LP_DELETE
> techniques
> and moved away to simplify things. We also tried reusing dead space without
> running PageRepairFragmentation. Each of these techniques worked just fine
> with slightly different performance characteristics. What we now have is a
> simplified algorithm which is much easier to follow and is safer, yet giving
> us a very good performance boost. I am not sure if this is the right time to
> throw new ideas because we would never be sure as what we are doing
> would be the most optimal solution. Would it help if we go with some
> solution right now, get rest of the review process done and then use
> the feedback during beta testing to tune things ? We may have far more
> data points at that time to choose one technique over other. And we
> would also know what areas to focus on.

I totally understand. I was just throwing out ideas to make sure I
fully understood it and to explore various options. I do agree we
should just wait for the review, knowing we have these trade-offs.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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