Limiting WLS to a single processor on a multi-CPU machine

How can I configure WLS to only use a single processor on a multiprocessor
machine? Will launching with green threads do the trick? Is there some way
to permit the use of native threads but to exclude a set of processors?
How do I do this under WLS318? WLS451?
Any help is much appreciated.
-Adam Galper

Adam Galper wrote:
How can I configure WLS to only use a single processor on a multiprocessor
machine?It's os-dependent, but most will allow you to bind a process to a single
or set of cpus.
Will launching with green threads do the trick?Yes.
Is there some way
to permit the use of native threads but to exclude a set of processors?
Yes.
== Rob
>
How do I do this under WLS318? WLS451?Any help is much appreciated.
>
-Adam Galper

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Upgrading from single processor to multi processor

I am looking for information on upgrading a 7.3 Oracle from a
single processor to a multi processor. I will be putting in
another processor in my server and would like to know how to get
Oracle to use this second processor. I know that I need to
upgrade Windows NT to multiprocessor first but what do I need to
do after that with Oracle.

I'm not certain why that would be the wrong boards. I guess HP has the wrong boards posted on their product's support site at the link below.
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesI...
When I clicked on Support Forum, that is where it took me.
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

Are a single ns-slapd process and its 32 LWP (light weight processes) limited or bound to a single processor?

ns-slapd and its LWP sub-processes seem to appear as a single process in some tools. Does this limit them to only being able to use one of the available processors on a multi-processor system, either due to lock management or for some other reason?
W see all the CPUs on a four processor system receiving activity, but the system never exceeds 25% utilization, or, the total of a single CPU.
Is this a limitation, or are we just not using it much yet?

<i>Are a single ns-slapd process and its 32 LWP (light weight processes) limited or bound to a single processor?</i>
The short answer:
No, and you shouldn't need to worry about it anyway.
The long answer:
The configuration LDAP is never a bottleneck in an iAS system. You could have hundreds of iAS servers running off a single instance and a single processor LDAP would still be able to handle the configuration requests easily.
If you also use your LDAP server as an authentication repository, you should size your LDAP server based on your authentication needs. But even if you are using iDS as an authentication store there are several other factors to keep in mind.
1. iDS scales pretty effectively up to about four CPU's for the most important operations (i.e. reads)
2. Unless you are running some unusual application server hardware, you will run out of disk i/o long before you run out of CPU power.
3. If you have any significant load on the directory server you should probably offload it onto its own server (or partition) anyway so that it doesn't steal excessive amounts of memory from that appserver.
4. Similarly, if you are putting a lot of stress on the directory server with authentications, you should consider tuning the directory server for those authentications.
I guess a little more detail about your application server architecture would be helpful in figuring out why your CPU doesn't exceed 25%. I strongly doubt that it has anything to do with slapd, however.

Multi-Processor Systems vs Single Processor systems

In general, is it better to run Weblogic on a fast single processor system
or on a multi-processor system where the individual cpus are less powerful?
I am assuming that the platforms are WINTEL and all other things (memory,
disk channels etc) are equal.
What are the licensing implications of one philosophy over the other?

Jim Ewing wrote:
>
In general, is it better to run Weblogic on a fast single processor system
or on a multi-processor system where the individual cpus are less powerful?
I am assuming that the platforms are WINTEL and all other things (memory,
disk channels etc) are equal.You'll hate me for saying this, but it depends on your application and
your client load.
I'd suggest that you run a load test against both systems and compare
the results.
>
What are the licensing implications of one philosophy over the other?You pay for WLS by the number of CPUs.
-- Rob
Coming Soon: Building J2EE Applications & BEA WebLogic Server
by Michael Girdley, Rob Woollen, and Sandra Emerson
http://learnweblogic.com

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mdinger

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Message was edited by: Roald73

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HotSpot 1.4.2_02, Solaris 9, single processor
We've developed a telecom application which requires low latency in response to network events. I've been observing fairly long full GC pauses between 0.5 and 2.0 seconds, which is unacceptable for our application. Minor GC pauses are quite brief, and acceptable, but only rarely occur after the system is up and running for some time. Full GCs happen regularly at 1 minute intervals.
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Hi
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Hi,
This is a general question and I tried to find answer for it, but couldn't find so came here as usual.
When designing a new Java project do we need to consider whether the application will be running in a single processor/multi processor. Does our design affect assigning thread to different processors? if so what the steps that we need to take, so that my application makes full use of multiprocessor. What is the difference in desinging application for single processor and multi processsor? Recently we had a problem in which our application makes use of only 2 processor out of 16 and I have no answer for it.
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I have some good amount of experience working with
multi threaded java program and i know about the
overhead involved and overkill in multi threaded
programs.
let's assume that for the moment (many beliefs held about MT and MP computing are wrong, including possibly some or all of my own).
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If it was correctly implemented before, no.
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threads to different processor, then it doesn't
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intelligently give different threads to different
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Does anyone have any idea what is going on? Thanks.
P.S. You can also respond to: [email protected]

I am confused.
Is the question about threads or processes? A thread
would be started with java.lang.Thread. A process
would be started with Runtime.exec(). And a script
file is only going to be relevant to a process. It
has nothing to do with a thread.I was wondering that as well, but I ignored what might be bad data and just took a stab at the most likely problem. No clue why the behavior with multiple processes should be as decribed - if so, it's definitely a very unlikely OS defect.
Chuck

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Hi all, hope this is the right place to put this post.
I'm finally about to take the plunge and get a new mac pro, putting my old G4 out to graze.
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I work mainly with photoshop, illustrator, indesign, painter and increasingly flash and dreamweaver.
It's going to cost me a couple of thousand so I need to get my choice right.
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Hi northey;
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had anyone install a Callmanager 4.1 dual processor version of CM4.1-K9-X345D= before in a single CPU in a dual processor capable server before.
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Limiting WLS to a single processor on a multi-CPU machine

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