| From: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Sergio Lopez <sergio(dot)lopez(at)nologin(dot)es>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Benchmark comparing PostgreSQL, MySQL and Oracle |
| Date: | 2009-02-20 23:17:02 |
| Message-ID: | 499F39EE.5060201@paradise.net.nz |
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| Lists: | pgsql-performance |
Robert Haas wrote:
>
> The biggest flaw in the benchmark by far has got to be that it was
> done with a ramdisk, so it's really only measuring CPU consumption.
> Measuring CPU consumption is interesting, but it doesn't have a lot to
> do with throughput in real-life situations.
>
... and memory access. Measuring these two in isolation from any
(real/usual) io system is interesting but perhaps only as a curiosity -
however, it would become much more interesting if we could see how the
results change when a disk based filesystem is used (or even raw for the
big O and innodb and filesystem for postgres...).
regards
Mark
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