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From Jonas Ahlinder <jonas.ahlin...@digitalroute.com>
Subject RE: performance issue
Date Thu, 16 Oct 2008 17:29:08 GMT

I do believe that both desktop and server has disk cache turned on, but i will definitely
confirm this in the morning.
Also im aware that this impacts durability.
From: Dag.Wanvik@Sun.COM [Dag.Wanvik@Sun.COM]
Sent: Thursday, October 16, 2008 5:38 PM
To: Derby Discussion
Subject: Re: performance issue

Jonas Ahlinder <jonas.ahlinder@digitalroute.com> writes:

> The first issue is that on a desktop machine ( running vista ) with
> two 7.2k rpm sata disks I get over 900 tps, while on a server (
> running RHEL 5 ) and two 15k rpm sas disks, I get around 250 tps.

Could it be that the desk top machine has disk caching enabled,
whereas the server disks do not? For durability you would want it
switched off.


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