On 8/27/2004 11:06 PM, josh@bitbuckets.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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