From: | Jan Wieck <JanWieck(at)Yahoo(dot)com> |
---|---|
To: | josh(at)bitbuckets(dot)com |
Cc: | pgsql-advocacy(at)postgresql(dot)org |
Subject: | Re: 8.0 Press Release, Draft Two |
Date: | 2004-08-29 14:23:24 |
Message-ID: | 4131E6DC.20101@Yahoo.com |
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Thread: | |
Lists: | pgsql-advocacy |
On 8/27/2004 11:06 PM, josh(at)bitbuckets(dot)com wrote:
> Improved Memory and I/O usage: With this release of PostgreSQL, the
> memory and disk I/O subsystems have been improved to use shared buffers
> more effectively. With this improvement comes an increase in speed and
> performance.
Since you try to attach name tags to features, the ARC, bgwriter and
vacuum-delay work (if that's what you mean with the above) was also
sponsored by Afilias.
I have no evidence that it actually increases speed or performance, and
I would even say it reduces total throughput slightly. It makes the
responstimes more predictable and gives them a lower standard deviation,
which is a quality very much appreciated by those who have service
level agreements saying ugly things like "98% of transactions must
finish in under 3 seconds" in a 24x7 environment.
Jan
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