Re: JetStress Available Mbytes

Jetstress isn't all that granular, so you should be a bit careful when
interpreting the results. Compare the expected IO (derived form the
iops/mailbox inputs and number of mailboxes) against the achieved IO (based
on the tunings and thread count the IO level that was actually achieved, and
presumably the basis for the rest of the measurements). It looks like your
expected IO would be in the 100 IOPS range while your achieved would - with
one thread - be in the 600 IOPS range; not eactly appropriate relative to
the specific disk subsystem. See jetstress.doc page 33.


"DLane" <DLane@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:517AE5F7-FE2A-41B4-9186-0FA0A66EE734@xxxxxxxxxxxxxxxx
Hello,

I have the latest version of JetStress - 6/7/2006 - and am using Exchange
2003 SP2's ese.dll and other ese files to perform testing.

The server is a Dell 1425 with 1GB of RAM and local drive with the page
file
configured. I am connecting to a fibre SAN and have set the /3GB swith
along
with the /USERVA=3030 in addition to the registry entries required
according
the optimizing memory article for Exchange 2003.

I am using the default settings for JetStress when running the 2 hour
performance test. I have setup the system with 2 seperate volumes - one
for
the databases and one for the logs - I am using 1 storage group and
configured the test for 100MB mailbox limit, 200 users and .5IOPS per
user.

The storage solution is return disk sec/read and writes in the area of
.005
with a high of .008 - no disk queueing, etc.

The problem is the Available Mbytes ALWAYS drops below 2. I have tried
two
different servers and the only problem I can see in the Jetstress runs is
that Available Mbytes drops below the acceptable level - the behavior
seems
to be the same regardless of the /3GB setting - it looks like a memory
leak.
Anyone else seeing this?


.

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