Huh? The Sun 1.3, 1.4, and 5.0 JVMs use all 32 of
the CPUs on our
systems quite nicely. What may be going on is that
some administrator
has set Windows' CPU affinity to restrict all
threads of a given
process to a single CPU.
- Chuck
We have a recent and up2date Linux Redhat
From: Chris Hyzer [mailto:[EMAIL PROTECTED]
Subject: Re: Running Tomcat on multiple processors on Windows 2003
I thought Java used native threads by default, or at
least green threads on top of native threads
(one-to-one), so Im not sure how this fits in...
The green thread mechanism
Subject: Re: Running Tomcat on multiple processors on Windows 2003
Huh? The Sun 1.3, 1.4, and 5.0 JVMs use all 32 of
the CPUs on our
systems quite nicely. What may be going on is that
some administrator
has set Windows' CPU affinity to restrict all
threads of a given
process to a single CPU
Chris,
When running top you can toggle displaying
individual threads by hitting
H.
Also, you can see threads using ps with the -m
switch.
Jim T.
OK thanks, that is useful for visibility into threads
vs processes. But I would think that if the CPU usage
in top is 50% when one tomcat
From: Chris Hyzer [mailto:[EMAIL PROTECTED]
Subject: RE: Running Tomcat on multiple processors on Windows 2003
... so if we can get to 100% CPU usage on both CPUs with
one tomcat running under load, that would be great.
How about trying a simple two-thread Java program, where each thread
Hi, All,
A client of mine is having trouble getting Tomcat 4.1.27 to make use of
multiple processors on his quad processor system under Windows 2003. My
questions:
1. What can he do to enable Tomcat to make use of all 4 processors?
2. If a single instance of Tomcat can't make
1.What can he do to enable Tomcat to make use of
all 4 processors?
I dont know of an answer to that one. I think it is
impossible unless you have a JVM that will use 4
procs... Sun doesnt seem to do this.
2.If a single instance of Tomcat can't make use of
multiple
processors,
From: Chris Hyzer [mailto:[EMAIL PROTECTED]
Subject: Re: Running Tomcat on multiple processors on Windows 2003
I dont know of an answer to that one. I think it is
impossible unless you have a JVM that will use 4
procs... Sun doesnt seem to do this.
Huh? The Sun 1.3, 1.4, and 5.0 JVMs
Howdy,
afaik, one java + tomcat instance consumes a lot of memory. i.e. i set
it
It depends on your setup: how many webapps, how much memory they need,
how many connectors, how many processing threads, etc. Tomcat can run
with a small (8MB) memory footprint with a small webapp and one coyote
RE: Tomcat and multiple processors
-
max 512MB and startup 256MB.. as previous people of the thread said,
you
always install many tomcat so that one instance for one java
application,
because
Howdy,
I hope the problem was from memory leak.. however, I do feel it really
needs such much memory.
OK, some apps do need a lot of memory ;) That's legitimate.
what I am intending to do is to create more and more environment for
testing.
As we get new release of our application once a week,
- Have one tomcat/JBoss instance.
- Deploy multiple webapps to it, using the release number as part of the
webapp name, e.g. myapp-1.0, myapp-1.1, myapp-1.2.
- Have the testers use the tomcat
Howdy,
Sorry my typo: I meant a small data set, not a result data set ;)
Yoav Shapira
Millennium ChemInformatics
-Original Message-
From: sun zheng [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 14, 2003 11:03 AM
To: [EMAIL PROTECTED]
Subject: RE: Tomcat and multiple processors
# Sorry my typo: I meant a small data set, not a result data set ;)
: wellwell, it can not help us..
with best wishes
Zheng Sun
_
The new MSN 8: smart spam protection and 2 months FREE*
afaik, one java + tomcat instance consumes a lot of memory. i.e. i set it to
max 512MB and startup 256MB.. as previous people of the thread said, you
always install many tomcat so that one instance for one java application,
because it only uses much disk ?? I thought it costs too much memory
It would be nice :)
- Original Message -
From: [EMAIL PROTECTED]
To: Tomcat Users List [EMAIL PROTECTED]
Sent: Friday, September 05, 2003 12:07 AM
Subject: Re: Tomcat and multiple processors
(1) Install TC as many times as you need JVM instances;
(2) for each instance, rename home
curious as to how
it all works :)
Thanx in advance!
Russ
-Original Message-
From: John Turner [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 04, 2003 4:16 PM
To: Tomcat Users List
Subject: Re: Tomcat and multiple processors
Matt Raible wrote:
1. Does
Message -
From: [EMAIL PROTECTED]
To: Tomcat Users List [EMAIL PROTECTED]
Sent: Friday, September 05, 2003 12:07 AM
Subject: Re: Tomcat and multiple processors
(1) Install TC as many times as you need JVM instances;
(2) for each instance, rename home before proceeding with another
installation
We are getting ready to deploy a number of applications to Tomcat - I'm
pretty familiar with Tomcat and Java, but have a couple of questions:
1. Does it support multiple processors? We have a Tomcat instance in
production on a NT box with 4 processors, but Tomcat only seems to use one.
Does the
Hola,
1. Does it support multiple processors? We have a Tomcat instance in
production on a NT box with 4 processors, but Tomcat only seems to use
one.
Does the 1.4.2 JVM support MP?
As you guessed in your question, MP support is much more VM-specific
than app-specific. Tomcat doesn't have
Matt Raible wrote:
1. Does it support multiple processors? We have a Tomcat instance in
production on a NT box with 4 processors, but Tomcat only seems to use one.
Does the 1.4.2 JVM support MP?
Yes, at least on Sun hardware with Solaris 8, and Intel hardware with RH
Linux 7.x (duals only...we
3. We plan on deploying 42+ applications to a number of
Tomcat servers.
Since each application will support 1 customer - I think
it's a good idea to
have 1 app - 1 tomcat - so if Tomcat crashes, it only
affects that customer
- rather than all customers. I've heard of setting up a
works :)
Thanx in advance!
Russ
-Original Message-
From: John Turner [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 04, 2003 4:16 PM
To: Tomcat Users List
Subject: Re: Tomcat and multiple processors
Matt Raible wrote:
1. Does it support multiple processors? We have a Tomcat
:)
Thanx in advance!
Russ
-Original Message-
From: John Turner [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 04, 2003 4:16 PM
To: Tomcat Users List
Subject: Re: Tomcat and multiple processors
Matt Raible wrote:
1. Does it support multiple processors? We have a Tomcat
in
CATALINA_BASE not in CATALINA_HOME.)
-Original Message-
From: John Turner [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 04, 2003 10:16 PM
To: Tomcat Users List
Subject: Re: Tomcat and multiple processors
1 virtual host = 1 Tomcat instance = 1 VM = 1 application
We've had
as to how
it all works :)
Thanx in advance!
Russ
-Original Message-
From: John Turner [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 04, 2003 4:16 PM
To: Tomcat Users List
Subject: Re: Tomcat and multiple processors
Matt Raible wrote:
1. Does it support
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