Hi,
If you want to use Tomcat for high loads, I suggest you to use apache/mod_jk
and a cluster of Tomcat instances.
With this solution you'll have load-balancing and failover for a lot of users.
I don't use a HP very powerful, so, for the performances, I don't know if it is
better to have one
1a) It depends on your code. TOmcat can handle it but only if your code can
also scale.
1b) Free: Jmeter, seige, apache ab - it depends on the type of test
2) See the faq or wiki
http://jakarta.apache.org/tomcat/faq/performance.html
http://wiki.apache.org/jakarta-tomcat/UsefulLinks
3) Maybe.
before you can answer that question, you need to know what the average
and peak concurrent requests is. without that 300-400 concurrent users
doesn't mean much.
If those 400 users hit the site once per minute average over 30
minutes, it would mean 12,000 requests in 30 minutes. Even if the
user
Hi,
We are planning to deploy an application (JSP/Tomcat/Oracle) for 300-400
concurrent users. The hardware is HP/True UNIX platform and it is very
powerful. Unfortunately we can not deploy the application in a phased
wise manner.
Can somebody help us to understand :
1. How scalable Tomcat
that the way the application works and its design is scalable and efficient
are well taken.
Thanks again,
Haytham Samad
-Original Message-
From: Chakravarthy, Sundar [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 04, 2003 10:48 AM
To: Tomcat Users List
Subject: RE: Tomcat Scalability
On Mon, Mar 03, 2003 at 11:32:07PM -0600, Haytham Samad wrote:
I have searched in the mail archive and did not find a comprehansive
answer to the settings one needs to look for to make sure Tomcat
scales with an increasing number of users.
You'll probably get more milage out of
Haytham Samad wrote:
Anything on can do to set Tomcat up to scale?
I am running Tomcat as a service on Win 2K.
You could start by running it on Linux instead to save all that memory
and processor power that Windows consumes :)
But seriously, I'm interested in hearing how Tomcat can scale, too.
it's going to be hard to summarize tuning in a
paragraph or even a few pages. If there aren't any
existing weblogs to tell you the amount of traffic it
will get, you're only good solution is to implement
logging and monitoring.
then everyday look at how the site is performing,
graph the results
There are a lot of companies using Tomcat in
production and some of them are large sites that get 1
million+ page views a day. Just because there are a
lot of calls, it doesn't necessarily mean it's a
problem.
scaling a website to handle millions of hits a day
takes time and thorough testing. If
Scability/Perfomance/Memory was talked about many times in the past. I
am still digging up good threads/sites with respect to the FAQ, but here
is what I have so far, each page has links to the appropriate discussion
thread in the tomcat-user lists.
Performace:
Users List
Subject: Re: Tomcat Scalability
Scability/Perfomance/Memory was talked about many times in the past. I
am still digging up good threads/sites with respect to the FAQ, but
here
is what I have so far, each page has links to the appropriate
discussion
thread in the tomcat-user lists
one more note. Persistence is the only effective tool
for high performance! No amount of money or talent can
beat persistence when it comes to making sure your
website works reliably and responds within a set time.
peter
--- Tim Funk [EMAIL PROTECTED] wrote:
Scability/Perfomance/Memory was
to boost Tomcat, unless I absolutely have
to.
-Original Message-
From: Peter Lin [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 04, 2003 9:28 AM
To: Tomcat Users List
Subject: Re: Tomcat Scalability
one more note. Persistence is the only effective tool
for high performance
I have searched in the mail archive and did not find a comprehansive answer
to the settings one needs to look for to make sure Tomcat scales with an
increasing number of users. I have read about the tweaks that can be made
to the JVM to make the GC work more efficiently and allocating enough
I have the following in production:
Tomcat 4.1, JDK 1.3.1, and MySQL on a Dual CPU Sun 250 app server and Apache
using mod_jk 1.2 on a separate server. We are now getting 4 weeks continuous uptime.
I stop and restart Tomcat once each month because the minimum memory the java heap
uses over time
I would say Tomcat 4.1.x probably would be good for you mainly if you
uses lots of Taglibs, if they actually will work on it.
Btw, I'm still using 4.0.x... how everybody is doing with 4.1.x? I
heard is too much buggy for production right now.
On Fri, 2002-10-25 at 12:20, Glenn Nielsen wrote:
Hi,
I would say Tomcat 4.1.x probably would be good for you mainly if you
uses lots of Taglibs, if they actually will work on it.
Btw, I'm still using 4.0.x... how everybody is doing with 4.1.x? I
heard is too much buggy for production right now.
We're using 4.1.10-LE and 4.1.12-LE in
[EMAIL PROTECTED]
Assunto: Re: Tomcat Scalability - Long
I would say Tomcat 4.1.x probably would be good for you mainly if you
uses lots of Taglibs, if they actually will work on it.
Btw, I'm still using 4.0.x... how everybody is doing with 4.1.x? I
heard is too much buggy for production right
Hi,
Does anyone have any solid information about the scalability of Tomcat?
It
seems very limiting to me, but that is hopefully due to improper
What are you looking for by solid information? ;)
Here are some details about one of our environments:
An 18-CPU Sun Ultra Enterprise-class server,
: Brandon Cruz [mailto:bcruz;norvax.com]
Sent: Thursday, October 24, 2002 3:36 PM
To: Tomcat Users List
Subject: Tomcat Scalability - Long
Does anyone have any solid information about the scalability of Tomcat? It
seems very limiting to me, but that is hopefully due to improper
configuration. Here
Brandon Cruz wrote:
Does anyone have any solid information about the scalability of
Tomcat? It
seems very limiting to me, but that is hopefully due to improper
configuration. Here is our situation and what seems to be happening
under a
small amount of stress.
Try upgrading to either:
-
in a UNIX environment.
John
-Original Message-
From: Brandon Cruz [mailto:bcruz;norvax.com]
Sent: Thursday, October 24, 2002 3:36 PM
To: Tomcat Users List
Subject: Tomcat Scalability - Long
Does anyone have any solid information about the scalability
of Tomcat? It
seems very
Does anyone have any solid information about the scalability of Tomcat? It
seems very limiting to me, but that is hopefully due to improper
configuration. Here is our situation and what seems to be happening under a
small amount of stress.
---About our Environment---
PIII 1.0Ghz
512 Meg Ram
If your kernel is not in the 2.4.18-2.4.19 range, you should update the
kernel. 7.1 is pretty old. It shipped with a very early 2.4 series kernel.
-Original Message-
From: Brandon Cruz [mailto:bcruz;norvax.com]
Sent: 24 October, 2002 1:36 PM
To: Tomcat Users List
Subject: Tomcat
-
From: Brandon Cruz [mailto:bcruz;norvax.com]
Sent: 24 October, 2002 1:36 PM
To: Tomcat Users List
Subject: Tomcat Scalability - Long
Does anyone have any solid information about the scalability of Tomcat? It
seems very limiting to me, but that is hopefully due to improper
configuration
Of
[EMAIL PROTECTED]
Sent: 24 October, 2002 2:06 AM
To: Tomcat Users List
Subject: Re: Tomcat Scalability - Long
Hi.
I am still on kernel 2.4.2 and it seems okay.
May I ask why we need to upgrade to 2.4.19 ?
Sexton, George wrote:
If your kernel is not in the 2.4.18-2.4.19 range, you should
Hello all --
I have a configuration problem on my setup of Tomcat (v 4.0.3). I am
managing this machine for my university's CS department, so there are
issues of security that must be followed, namely that students should
not be able to view each others source code (== cheating). We are using
To: [EMAIL PROTECTED]
Subject: Tomcat scalability question
Hello all --
I have a configuration problem on my setup of Tomcat (v 4.0.3). I am
managing this machine for my university's CS department, so there are issues
of security that must be followed, namely that students should not be able
to view
The permission denied can be generated one of two ways.
First, the catalina.policy file must grant the correct FilePermission.
Even if the correct FilePermission is granted in catalina.policy, you
still have to comply with normal unix file ownership/permissions.
If it is a catalina.policy
/home/usr/username.
Nicholas Orr
-Original Message-
From: Pat Schaider [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 10 September 2002 4:08 PM
To: [EMAIL PROTECTED]
Subject: Tomcat scalability question
Hello all --
I have a configuration problem on my setup of Tomcat (v 4.0.3
and
thus has access to everything.
Well hope you get a solution.
Nicholas Orr
-Original Message-
From: Pat Schaider [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 10 September 2002 4:57 PM
To: Tomcat Users List
Subject: RE: Tomcat scalability question
I should clarify. Security
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