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

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.

Dag


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