Re: Hardware performance

From: "Magnus Hagander" <mha(at)sollentuna(dot)net>
To: "PgSQL Performance ML" <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Hardware performance
Date: 2003-07-18 13:25:54
Message-ID: 6BCB9D8A16AC4241919521715F4D8BCE16F96B@algol.sollentuna.se
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> > >Adam Witney wrote:
> [snip]
> > If you would go with that one, make sure to get the optional BBWC
> > (Battery Backed Write Cache). Without it the controller
> won't enable
> > the write-back cache (which it really shouldn't, since it
> wouldn't be
> > safe without the batteries). WB cache can really speed things on in
> > many db situations - it's sort of like "speed of fsync off,
> security
> > of fsync on". I've seen huge speedups with both postgresql
> and other
> > databases on that.
>
> Don't forget to check the batteries!!! And if you have an
> HPaq service contract, don't rely on them to do it...

That's what management software is for.. :-) (Yes, it does check the
batteries. They are also reported on reboot, but you don't want to do
that often, of course)

Under the service contract, HP will *replace* the batteries for free,
though - but you have to know when to replace them.

//Magnus

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