Our test/dev box is a single z900 IFL with 4.5GB (3.5 central 1 xstor).
There are 49 servers running today there. 7 of these are WebSphere. (Note:
prod is not on this - it's off on 2 z990s).
We were doing pretty well on that with few complaints from the WebSphere
testers/developers, also averaging in the low 20's for cpu until CVS came
along... Now we average 90% (we will be moving that somewhere else - perhaps
on of the z990s with crypto).
But there does seem to be a big difference in the 900 vs the 990 - websphere
starts up and shuts down way faster for one.
How big are your WAS test server virtual machines?
Marcy Cortes
WFS Enterprise Hosting Services - VM & Linux
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-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Bennie
Hicks
Sent: Wednesday, April 06, 2005 10:44
To: [email protected]
Subject: Re: [LINUX-390] WebsphereAS on zSeries performance?
I did fail to mention that we run a z900, single IFL with 4GB (3 central
1 xstore, while awaiting anoter 4G for central) on two CEC's for a
redundant web hosting environment. I have about 15 guests (mostly
apache test & prod servers with an NFS server to share the data to the
other CEC IFL). I had been averaging about 22-26% CPU until two test
WAS servers were built, and they got the rest (at times)! Complaining
about start up time and java compile times. Basically running all
limitsoft with relative shares at this point to keep prod (also
quickdsp'ed) running along. Was just wondering what others may have
noticed in the WAS environment, as my initial observation is that at
least on the z900 that a single IFL will not make testing clients happy
it seems. Yeah, we have not attempted to tune it yet and there are a
couple good papers out there by IBM'ers, but think the CPU aspect is
inevitably bad .........I guess we'll see, huh?!
Mike Riggs wrote:
We currently support 6 LINUX guests (soon to be 8) with 3 of them running
WAS, 3 running UDB. We do this with a z/890 and only 1 IFL and 3gig of
memory.
More memory is due in and we're still arguing the need for an additional
IFL.
Mike Riggs
Supreme Court of Virginia
(804) 786-7823
Rich Smrcina
<[EMAIL PROTECTED]
om> To
Sent by: Linux on [email protected]
390 Port cc
<[EMAIL PROTECTED]
IST.EDU> Subject
Re: WebsphereAS on zSeries
performance?
04/05/2005 03:16
PM
Please respond to
Linux on 390 Port
<[EMAIL PROTECTED]
IST.EDU>
Going to a z890 IFL (from a MP3K IFL) was a major improvement. Startup
time went from 15-20 minutes to 2 minutes. A single IFL of sufficient
power is enough here, but that always depends upon your specific
workload. The apps are fairly well tuned also (which helps anywhere).
Bennie Hicks wrote:
Anybody out there running WAS on a single IFL? Interested in your
thoughts/comments on performance, impacts of java compiles, etc. and
whether or not a single IFL engine is enough..............thanks!
--
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Rich Smrcina
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WAVV 2005 - Colorado Springs - May 20-24, 2005
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Bennie Hicks - 919-981-5107
Network Systems Programmer
State of North Carolina
Office of Information Technology Services
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