Re: Domino Utilities and Server Performance Issues

Man, that's no good. A bad disk controller can be rough on performance.

Also, and you all may know this already, if you get the message that your 
Cache Battery is going to need replacing - DO IT! Our CEs tell us all the 
time of companies that wait until the battery actually dies. It's too late 
then, because without the cache the performance is abysmal! :)

Chris Whisonant
Senior Mid-Range Systems Administrator
Comporium
803-326-7270
IBM Certified Specialist -- eServer i5 iSeries Domino Technical Solutions 
V5R3
IBM eServer Certified Systems Expert - iSeries Technical Solutions V5R2
IBM Certified System Administrator - Lotus Notes and Domino 6/6.5
IBM Certified System Administrator - Lotus Notes and Domino 7
IBM Certified Associate Developer - Lotus Notes and Domino 6/6.5

domino400-bounces+chris.whisonant=comporium.com@xxxxxxxxxxxx wrote on 
01/29/2007 10:30:03 PM:

I mis-stated the issue before. Data for all 10 server instances were
on all 22 drives but for some reason 6 drives were over 40% utilized
while the other 16 were at 5%. Nomally all 22 had averaged between 3
and 9% utilization. IBM provided an additional PTF to apply and we 
did try and rebalance the drives but none of it helped. Finally, 
last night, I received a message on my screen which stated a 
critical error had occured and shortly afterwards received a call 
from IBM that my disk array control ( that controlled those 6 drives
coincedentally ) is failing. They are actually here as I type this, 
replacing the bad hardware. Let us hope this resolves the problems 
we have been having. 
-- Sent from my Blackberry Wireless Device --
Jose L. del Risco
Oshkosh Truck Corporation
Corporate Domino Administrator
(920) 420-5646
Jdelrisco@xxxxxxxxxxxx


----- Original Message -----
From: MSteck
Sent: 01/29/2007 07:37 PM
To: Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx>
Subject: Re: Domino Utilities and Server Performance Issues



   You stated "When he did some further digging he noticed that ALL of 

the

   data for all 10 server instances on our LPAR were all on 6 of the 22 

disks

   that we have."

   As your iSeries person will say, this is when you are not "balancing 

your

   ASP" data.  The balancing is usually set when you are adding drives?

   Slowness of response can be attributed to faults and thus disk 

utilzation?

   I assume your iSeries Admin noticed high Disk utilization for the 6 

drives

   in question as well?

   More importantly, has the balancing resolved your issue, if not, not
   knowing your system parms, 10 instances on 1 LPAR seems abit heavy
   depending on many factors.

   Have you added users or activated scheduled agents or increased
   replication from a new app in last couple of weeks perhaps.  Disk
   utilizaton is not a exact science, sometime you reach a breaking 

point on

   performance that just appears. 2nd, are any of the other LPARS 

sharing

   disks?  Or are you sharing bus'es of drives?  Many questions ???

   thx

   Michael Steck
   Web Analyst
   Floyd Memorial Hospital & Health Services
   812-949-5954
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