if you use tomcat 5.0.19 or new, you can use JMeter to monitor tomcat.
peter
On 8/10/05, Seth Ladd [EMAIL PROTECTED] wrote:
Dave Morrow wrote:
Does anyone know how to use SNMP tools to monitor a Tomcat server? Are
there any open source tools to assist or add this ability?
With JDK 5
://jakarta.apache.org/jmeter/usermanual/build-monitor-test-plan.html
peter lin
On 8/10/05, Lintang JP [EMAIL PROTECTED] wrote:
how can I do monitoring with JMeter ? plis advice...
On 8/11/05, Peter Lin [EMAIL PROTECTED] wrote:
if you use tomcat 5.0.19 or new, you can use JMeter to monitor tomcat.
peter
or you could just use one of the free sites out there like
flickr.com
spogger.com
peter
On 7/14/05, Ben Kim [EMAIL PROTECTED] wrote:
Sorry about this off topic post, but I am looking for a couple
free software for the pictures on my web sites. One is to display
pictures as slide show,
you can easily setup JMeter to monitor tomcat and save the results to a log.
peter lin
On 6/17/05, Hossein S. Attar [EMAIL PROTECTED] wrote:
Hi:
Is it possible to instruemnt Tomcat to collect statistics such as
averasge response time (for each servlet), etc and then somehow get
you could always look at the new performance benchmark i ran for
static files on the resources page. it shows the performance of tomcat
5 as the number of clients increase and file size increases.
hope that helps
peter
On 6/2/05, Wallace, Scott [EMAIL PROTECTED] wrote:
Network is 100megabit
I would advise using the tag plugins to change tags to pure java. JSP
tags are considerably slower than pure JSP + java, but many people
find that combination bad on maintenance. When remy and I worked on
the book back in 2002, I did quite a bit of comparison between pure
java and JSTL.
as you
correction to my previous email.
On 5/28/05, Remy Maucherat [EMAIL PROTECTED] wrote:
On 5/28/05, Peter Lin [EMAIL PROTECTED] wrote:
as you see already, using JSTL means a single line of code gets
converted to several lines of JSTL api calls. once you look at how
many classes are involved
On 5/28/05, Kevin Burton [EMAIL PROTECTED] wrote:
Remy Maucherat wrote:
It will obviously use more CPU and make more API calls. However, it
does not allocate any objects, but instead will reuse per page objects
(which is very fast). So overall, it sounds weird to me that the
bottleneck
I don't know about others, but I prefer to run tomcat on port 8080 and
then setup the router to redirect port 80 to 8080. it's rather easy to
setup these days.
peter
On 5/19/05, Remy Maucherat [EMAIL PROTECTED] wrote:
On 5/19/05, Mark [EMAIL PROTECTED] wrote:
I was very interested in the
If you can afford it, go with hardware load balancing. it's easier to
setup and configure. it's also more reliable and robust. of course,
you have to open up your wallet and let the money fall out.
if you really want sophisticated load balancing that allows you to
schedule a server to go down, i
to install
Tomcat 5 to give it a try since JMeter can't play with our Tomcat 4.1.26
for monitoring purposes.
Any other candidates out there?
TIA.
Guillaume
-Original Message-
From: Peter Lin [mailto:[EMAIL PROTECTED]
Sent: 09 May 2005 18:47
To: Tomcat Users List
peter lin
On 5/9/05, Guillaume Lahitette [EMAIL PROTECTED] wrote:
Hi,
I am looking for feedback on (preferably free) tools to monitor the
performance of Tomcat during stress testing.
We're running Tomcat 4.1.26 in production on Linux and Windows (as a service).
Ideally, the tool would
to give it a try since JMeter can't play with our Tomcat 4.1.26 for
monitoring purposes.
Any other candidates out there?
TIA.
Guillaume
-Original Message-
From: Peter Lin [mailto:[EMAIL PROTECTED]
Sent: 09 May 2005 18:47
To: Tomcat Users List
Subject: Re: Off Topic
it sounds like the problem is caused by a large number of connections
dying holding things up.
peter
On 5/6/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
153 ESTABLISHED connections to port 443
553 connections to port 443 in the process of dying.
1420 connections total (Assuming I'm
should
also solve this problem.
--
Virtually,
Andre Van Klaveren
Architect III, SCP
Enterprise Transformation Services
Unisys Corporation
On 4/21/05, Caldarale, Charles R [EMAIL PROTECTED] wrote:
From: Peter Lin [mailto:[EMAIL PROTECTED]
Subject: Re: OutOfMemoryError - 100 thread
my 2 bits.
when I tried to replicate the issue LeeAnn saw, it was pretty clearn
the JVM can't resize the heap fast enough to account for the large
number of webapps being loaded. simply increasing the initial heap
should solve the problem.
peter
On 4/21/05, Caldarale, Charles R [EMAIL
that requires quite a bit
of profiling to really understand how an application is allocating
memory.
peter
On 4/21/05, J. Ryan Earl [EMAIL PROTECTED] wrote:
Peter Lin reproduced and fixed the problem LeeAnn is seeing, and said If I
set my heap to -Xms256m -Xmx512m I'm able to load the 18 webapps
to work.
peter
On 4/21/05, Caldarale, Charles R [EMAIL PROTECTED] wrote:
From: J. Ryan Earl [mailto:[EMAIL PROTECTED]
Subject: RE: OutOfMemoryError - 100 thread limit?
Peter Lin reproduced and fixed the problem LeeAnn is seeing,
and said If I set my heap to -Xms256m -Xmx512m I'm able
. =)
-ryan
-Original Message-
From: Caldarale, Charles R [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 21, 2005 9:53 AM
To: Tomcat Users List
Subject: RE: OutOfMemoryError - 100 thread limit?
From: Peter Lin [mailto:[EMAIL PROTECTED]
Subject: Re: OutOfMemoryError - 100
silly question, does this webapp have like thousands of JSP and
servlets and preload the JSP's?
peter
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of.
Another way to get the heap to resize in larger increments and prevent
it from getting smaller is to set the -XX:MinHeapFreeRatio.
peter lin
On 4/21/05, LeeAnn Pultz [EMAIL PROTECTED] wrote:
Possible success!
I went back to my weblogic installation which I was successfully able to
open up 25
glad I can help. it's the little odd edge case problems that I find
most interesting. it was fun to figure why that behavior was occuring.
peter
On 4/21/05, J. Ryan Earl [EMAIL PROTECTED] wrote:
Awesome, I'm glad that was solved as I'm about to do the same thing with our
application: running
:
From: Peter Lin [mailto:[EMAIL PROTECTED]
Subject: Re: OutOfMemoryError - 100 thread limit?
I'm just guessing here, but by forcing the maxPermSize to 128, it
leaves more space for the eden and prevents classes from getting
promoted to perm.
I think you're confusing tenured with perm
On 4/21/05, Caldarale, Charles R [EMAIL PROTECTED] wrote:
From: Peter Lin [mailto:[EMAIL PROTECTED]
Subject: Re: OutOfMemoryError - 100 thread limit?
so it would appear by setting the PermSize, the jvm is pushing all
java.lang.Class instances to Perm rather than loading them in eden
I'm able to go up to 647 threads and 500 concurrent connections with
5.5.4 without any problems. chances are, it's a memory leak in the
webapp. only way to know for sure is to profile the application.
peter lin
On 4/20/05, Tim Funk [EMAIL PROTECTED] wrote:
There are no limits in tomcat.
http
a memory leak in the
webapp. only way to know for sure is to profile the application.
peter lin
On 4/20/05, Tim Funk [EMAIL PROTECTED] wrote:
There are no limits in tomcat.
http://jakarta.apache.org/tomcat/faq/memory.html
-Tim
LeeAnn Pultz wrote:
I have a tomcat server
, but we aren't doing any of the real
work of rendering dynamic pages or talking to the database at this point.
I get the same results whether my Xmx is 84 megs or 512 megs - we're just
not using that much memory.
At 08:48 AM 4/20/2005, Peter Lin wrote:
that sounds very odd. so if I understand
that looks really bizzare to me. From the exception, it looks like
tomcat can't create a new thread to process the request. It makes me
think the previous threads that are done are being held by something
for some odd reason. Normally the threads should be available again.
What is the ramp up time
is creating threads at start, what are they doing?
peter lin
Threads Active : 94
Threads Active : 94
[Full GC 48357K-47096K(129792K), 0.6358540 secs]
LeeAnn Pultz
ExtraView Corporation
[EMAIL PROTECTED]
831-461-7100 x115
if your application is thread heavy, I would recommend changing it so
that one thread can manage several processes. creating 800+ threads is
going to hit a scalability and reliability wall very quickly. In
general, you want to make sure the number of threads remain constant
under constant load.
ahh ok. .. my confusion.
back to the problem you see. I've tested tomcat with 30-40 threads
without any problems in the past. Even with heavy weight JSTL tags in
JSP's, I'm able to go up to 50 threads with tomcat4.1.
I'll try hitting tomcat's status servlet with 50 threads tonight and
see what
I'll try loading up 18 version of my webapp and see if tomcat blows
up. should know in a hour or so
peter
On 4/20/05, LeeAnn Pultz [EMAIL PROTECTED] wrote:
when you say 50 threads, do you mean 50 separate web applications?
My concern right now is that we seem to be limited to 17-18 copies
by 4 megs
to figure out the heap setting.
peter lin
On 4/20/05, LeeAnn Pultz [EMAIL PROTECTED] wrote:
when you say 50 threads, do you mean 50 separate web applications?
My concern right now is that we seem to be limited to 17-18 copies of our
web app on a particular installation of tomcat
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
there's this little thing called the status servlet. It displays
information in HTML format for each webapp.
it can also show a subset of the full stats in XML. there's this
other project in jakarta called JMeter. It has a monitor for
tomcat5.0.19 and newer that can monitor one or more Tomcat
There's already a GUI monitor for Tomcat 5.0.19 and newer in JMeter.
if you want to graph the cluster, it would be a matter of extending
the monitor sampler to do so.
http://jakarta.apache.org/jmeter/usermanual/build-monitor-test-plan.html
peter
On Sat, 5 Mar 2005 11:07:47 -0500, e [EMAIL
,
Thanks, but I'm from looking over the docs its not clear how I would
implement a web based status page capable of send alerts, etc. I know
JMeter is great for loadtesting/profiling tomcat, but is it designed for
what I'm looking for?
-e
Peter Lin wrote:
There's already a GUI monitor
I've benchmarks tomcat 5.5.4 with jrockit5 and it worked fine on
Redhat FedoraCore1
peter
On Thu, 3 Mar 2005 10:26:37 -, Michael Cornell
[EMAIL PROTECTED] wrote:
Hi,
Just wondering if there is some documentation w regards to what/which
virtual machines tomcat (5.0.x) has been tested on
I would recommend using a profiler to track down memory leaks in your
webapp. Chances are there's a bug in your code that is causing the
memory leak.
real memory leaks in tomcat usually get discovered and fixed quickly.
OptimizeIt and JProbe both have eval versions you can download to
profile
if you're talking about XML transformation, the biggest factor is the
parser you use and the cpu speed. If you read my old performance
article on the resource page, you can see some old numbers for AMD
2ghz system.
depending on how much XML you need to handle concurrently, you may
want to
rather than setup tomcat + jk2 + apache, I would recommend setting up
a dedicated image server. If you look at the static file benchmark
results I posted recently, tomcat is actually faster for 1k files and
equal to apache for larger than 1k files.
http://cvs.apache.org/~woolfel/tc_results.html
+0100, Remy Maucherat
[EMAIL PROTECTED] wrote:
On Sat, 12 Feb 2005 10:51:53 +0100, PA [EMAIL PROTECTED] wrote:
On Feb 12, 2005, at 06:20, Peter Lin wrote:
For those who are curious. I decided to run apache AB against jetty to
see if there are any differences.
If you are into this kind
For those who are curious. I decided to run apache AB against jetty to
see if there are any differences.
Max Request/sec
--
tomcat 5.5.4 - 5584
jetty 5.1.2 - 2486
the results suggest tomcat's throughput for 1k static content is 2x
higher than the jetty 5.1.2.
peter
know
tomcat insdie and out. I would advise hiring some one because it's
near impossible to diagnose your problem without being at the system.
peter lin
On Tue, 08 Feb 2005 10:11:03 -0600, Eric Sandusky
[EMAIL PROTECTED] wrote:
To the developers of Tomcat and JK:
If Tomcat + JK cannot process
I generated a combined graph of the response time for tomcat 5.5.4 in
client mode.
http://cvs.apache.org/~woolfel/combined_graph.png
thought some people might find it interesting. the graphs were
generated by Jmeter.
peter
-
Wow, I thought my home dev environment was old and slow.
makes me wonder how many people bother to upgrade to the latest/newest
hardware :)
peter
On Thu, 3 Feb 2005 12:00:49 -0500, Parsons Technical Services
[EMAIL PROTECTED] wrote:
TAO www.taolinux.org
RHEL clone.
PIII 750 512M
A friend asked me to post this for him. He is experiencing some memory
issues related to Athlon 64 running Redhat Fedora Core3. Anyone know
if this is related to LD_ASSUME_KERNEL=2.2.5 issue?
thanks in advance
peter
his email below
the best way to figure out how much heap to set is to stress test your
application.
1. figure out the average load
2. figure out the peak load
3. stress test the webapp with default settings
4. tweak the settings and retest
5. compare the results
there's no magic formula that works for all
http://cvs.apache.org/~woolfel/benchmark_summary.pdf
I've posted a pdf version of the benchmark write up.
peter lin
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look here
http://cvs.apache.org/~woolfel/tc_results.html
http://cvs.apache.org/~woolfel/benchmark_summary.doc
peter
On Tue, 1 Feb 2005 11:52:37 -0600, sudip shrestha [EMAIL PROTECTED] wrote:
I would like to know if there is significant performance improvement
from 5.0.x to 5.5.x. Is there
I've updated the document with more charts from the excel spreadsheet
and tried to make the explanations more clear.
peter
On Mon, 31 Jan 2005 14:20:11 -0500, Peter Lin [EMAIL PROTECTED] wrote:
http://cvs.apache.org/~woolfel/benchmark_summary.doc
http://cvs.apache.org/~woolfel
http://cvs.apache.org/~woolfel/benchmark_summary.doc
http://cvs.apache.org/~woolfel/benchmark_summary.sxw
http://cvs.apache.org/~woolfel/tc_results.html
I've finished a complete draft of the benchmark results. If you have
any feedback, please email me directly. thanks in advance.
peter lin
I managed to spend some time this weekend graphing up the results. I
still have to add the results from Tim and write up a summary.
http://cvs.apache.org/~woolfel/tc_results.html
peter
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I'll post the war file in a few hours. heading out to buy some
groceries before the storm arrives.
peter
On Sat, 22 Jan 2005 08:42:31 -0500, Tim Funk [EMAIL PROTECTED] wrote:
Can you post a link to your 1k.png file?
-Tim
Peter Lin wrote:
I've updated the testplans.zip file
for the high thread count test, I decided to test with apache ab to
verify the jmeter results. it turns out for 1k png, jmeter isn't able
properly exercize apache or tc5. for files larger than 5k, the jmeter
results are accurate.
here's the results
server:
amd 2ghz
1Gb ram
Redhat fedora core1
for 100mbit
ethernet. If anyone can run some tests on gigabit ethernet, please
email me directly. thanks.
hopefully this will provide some basic performance information for all
tomcat users.
peter lin
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I've updated the testplans.zip file. in the zip file is a shell script
named starttest.sh
http://cvs.apache.org/~woolfel/testplans.zip
to run the script, change the output path and the ab path.
peter
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http://cvs.apache.org/~woolfel/tc_results.html
I've updated the graphs. it now includes the graphs for apache2 and
1.3.3. there's a couple graphs comparing TC to apache. the apache ab
results haven't been added yet, but I will do that this weekend.
enjoy.
peter
not small.
http://cvs.apache.org/~woolfel/raw_data.zip
peter lin
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I've cleaned the graphs up a bit and added the results for tc5.5.4. I
still have lots to finish, but hopefully people will find this useful.
http://cvs.apache.org/~woolfel/tc_results.html
peter
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laptop is set to 1400 x 1050, so
anything lower than that may be chopped on the side.
peter
On Thu, 20 Jan 2005 12:25:01 -0600, Caldarale, Charles R
[EMAIL PROTECTED] wrote:
From: Peter Lin [mailto:[EMAIL PROTECTED]
Subject: more graphs
I've cleaned the graphs up a bit and added
Here are some charts for the benchmark results I posted a few days
back. It's taking longer than I expected to create the charts.
http://cvs.apache.org/~woolfel/tc_results.html
enjoy.
peter
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with gzip header.
http://cvs.apache.org/~woolfel/testplans.zip
peter lin
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it interesting and useful. It will take me
a week or two to write up the results and generate the graphs.
peter lin
Tomcat 5.0.19 - jdk1.4.2
PNG
1K
---
protocol | samples | average | median | 90% line | min | max
Per Remy's request, I ran some more tests last night with larger
number of threads. the configuration of the test plan is as follows
1K png: 10, 50, 100, 150 threads
10K png: 10, 50, 100, 150 threads
each thread as was to 1000 iterations.
ramp up times: 1, 5, 10, 20 seconds
Server:
Redhat
+0100, Mladen Turk [EMAIL PROTECTED] wrote:
Peter Lin wrote:
Per Remy's request, I ran some more tests last night with larger
number of threads. the configuration of the test plan is as follows
What would be nice (since you have infrastructure set up)
is to compare the results with Apache2
any tomcat user out there have Redhat FC3 installed and want to help
run some tests? I will post the jmeter test plans this weekend.
it would make remy really happy :)
peter
And no FC 3 ? ;) I think it would run fine on your computer, and it's
a higher quality distribution overall (it
[EMAIL PROTECTED] wrote:
Peter Lin wrote:
Yup, I plan to try jdk5 with TC5.5.4 per Remy's request.
Cool, but can you compare the results with Apache2.0.52
when serving the same static content files on the same
hardware?
That would be very interesting thought. Even more then
bare
what a concept Schnapps over speed. Wonder what would happen if
someone made a redbull + Schnapps + speed cocktail 8-)
that wouldn't kill you, really.
I'll stop the jokes there.
peter
On Fri, 14 Jan 2005 14:59:57 +0100, Mladen Turk [EMAIL PROTECTED] wrote:
Peter Lin wrote:
If I have time
(2.6.9-1.667,i386).
unfortunately, the hardware is a desktop unit 760 MB ram, ide drive, 2.6
P4 (512 cache). let me know if i should give it a try.
Peter Lin wrote:
any tomcat user out there have Redhat FC3 installed and want to help
run some tests? I will post the jmeter test plans
, the hardware is a desktop unit 760 MB ram, ide drive, 2.6
P4 (512 cache). let me know if i should give it a try.
Peter Lin wrote:
any tomcat user out there have Redhat FC3 installed and want to help
run some tests? I will post the jmeter test plans this weekend.
it would make remy really
I've started a series of benchmarks to measure tomcat5 performance for
static files and compare it to apache2. Here are the results I have so
far. I thought others might find it interesting.
Server:
Redhat Fedora Core 1
AMD 2hgz
1Gb ram
jdk1.4.2
TC5.0.x ( have to double check the release number)
Good question. I haven't run the apache tests yet. I forgot that I
don't have apache2 installed on my linux box, so this weekend I plan
to install and run the tests.
once all the tests are done, I plan to write up a quick article,
generate some charts and zip up all the files, including the
JMeter has a monitor for tomcat 5.0.19 and newer. It doesn't work with
tomcat4 or older. in terms of restarting, you're probably going to
have to write a shell script to do that. Typically, on unix a cron job
is used.
peter
On Wed, 12 Jan 2005 15:12:15 +, Edd Dawson
[EMAIL PROTECTED] wrote:
that sits on the actual servers and
probes at set intervals and takes remedial action if necessary.. i just
wondered if anyone had documented doing such a thing before.
Peter Lin wrote:
-
To unsubscribe, e-mail: [EMAIL PROTECTED
any examples online (and i've been trying most of the day!)
Peter Lin wrote:
most people use Perl or shell scripts to do that. There's plenty of
scripts on the net for doing that by the process id. sorry, I don't
have any links handy. google is your friend.
peter
by the way, the 2 connection limit is actually hardcoded in the http
socket and not in IE. AFAIK, you can't turn it off or change it. You'd
have to write your own browser to get around that.
peter
On Tue, 11 Jan 2005 18:48:20 -0500, Hunt, Joseph (OVBU- Ft.Collins)
[EMAIL PROTECTED] wrote:
Good
how are you monitoring tomcat?
peter
On Wed, 12 Jan 2005 14:59:39 +1100, Rolf Zelder
[EMAIL PROTECTED] wrote:
Hi
I have got a simple web application containing a html page with a link to a
jsp page, which prints the memory status to the
console(Runtime.getRuntime().totalMemory()) . Now I
you could use jmeter's tomcat5 monitor. there's a coupl of commercial
tools out there that can monitor your production servers.
peter
On Thu, 30 Dec 2004 23:27:05 -0800, Hari Mailvaganam [EMAIL PROTECTED] wrote:
Hi:
What would be the best way to monitor the performance of Tomcat -
while
The jakarta JMeter monitor sends requests to Tomcat's status servlet
and uses the stats there to generate a performance graph. You can
monitor multiple servers with jmeter.
If you use a third party tool, it will have lots of other features,
but it most likely will not be able to utilize the stats
perhaps black magic?
what I would do is to try a few things.
1. increase the ramp up time and see if that affects it. It could be
the load balancer is helping tomcat handle the load
2. build the latest JMeter and use the distribution graph I wrote to
look at the requests. the new graph will
which another good reason to put the database on separate box. by
isolating tomcat and mysql, you can run tests on each. then you can
test the setup together and see what you get. that's how I generally
test my applications.
peter
On Tue, 30 Nov 2004 07:05:59 -0500, Tim Funk [EMAIL PROTECTED]
that would depend on what kind of application it is.
without more info, like does it hit a database, is the database hosted
on the same system or does the application get remote data it's going
to be hard for others to provide good recommendations.
peter
On Mon, 29 Nov 2004 12:43:07 -0700,
database driven. In this case it is running a mysql
database on the same machine.
What would be the recommened hardware configuration?
On a P4 2.4 with 1GB of RAM Tomcat is very happy!
Thanks
On Monday 29 November 2004 12:53 pm, Peter Lin wrote:
that would depend on what kind
] wrote:
Would this problem be solved by a hardware upgrade?
On Monday 29 November 2004 01:03 pm, Peter Lin wrote:
as Yoav recommended, tomcat should be on it's own server. I would put
mysql on another system. that should fix things. most likely the
slowness is the result of database
250ms response time is rock solid. Getting the total response time
lower than 250ms is pretty darn tough. based on your info, that means
each tomcat is getting on average 15-16 concurrent requests.
one way to improve the response time would be to use smart caching and
avoid the cost of making a
look at the poweredby list http://wiki.apache.org/jakarta-tomcat/PoweredBy
the biggest factor in how much bandwidth your 4 node cluster is
primarily going to be network bandwidth and database performance.
Normally, since buckle due to database crashing. I know of a directory
site that gets
the same rule still applies. that's what's just the reality of using
SSL and insuring security. A browser that is ssl compliant actually
should default to https. only way around that is to use a non-ssl
compliant browser.
peter
On Sat, 20 Nov 2004 16:59:31 -0800 (PST), footh [EMAIL PROTECTED]
which tool are you using to stress test? perhaps try a different tool
to double check? when I test, I like to use apache ab and jmeter to
validate the results. I'm a bit paranoid when it comes to telling
management, the server will handle X traffic :)
peter
On Thu, 18 Nov 2004 11:18:07 -0500,
that get used at both
computer.
This is Windows XP. I'll see if SP2 will do any difference. The
computer at home as SP2 on it.
Peter Lin wrote:
which tool are you using to stress test? perhaps try a different tool
to double check? when I test, I like to use apache ab and jmeter to
validate
that's interesting. makes me wonder what changes in SP2 cause the improvement.
peter
On Thu, 18 Nov 2004 14:30:16 -0500, Vy Ho [EMAIL PROTECTED] wrote:
With SP2 of Windows XP, the computer previously can't handle 50 threads
can handle 200 threads now. More than that, I got connection refused
I would second Remy's sentiment about XML and concurrent processes.
I've performed benchmarks with Java and C# on a P4 2.4ghz machine.
with 2-4K of XML 10-15 concurrent processes with consume roughly
60-70% of the CPU. With 30, you're going to hit 90-100% of the CPU. At
that point, more
interesting information. You're probably already aware of this, but
extrapolating 200 concurrent connection/requests over a 24hr period
would mean in excess of 20 million page views or webservice requests
per day.
that would be a ton of traffic. over the network, you can expect
considerably lower
just for clarification. Do you mean zombie threads? Threads that are
not reachable, but still running. My advice would be to download a
profiler and figure out the cause.
peter
On Mon, 15 Nov 2004 14:42:14 +0100, Steffen Heil [EMAIL PROTECTED] wrote:
Hi
I have a situation, where a lot of
-
From: Steve Kirk [EMAIL PROTECTED]
To: 'Tomcat Users List' [EMAIL PROTECTED];
'Peter Lin' [EMAIL PROTECTED]
Sent: Wednesday, November 10, 2004 7:57 PM
Subject: RE: Multi-Site Clustering? (hot failover)
Thanks, interesting. But I think we're talking at crossed
purposes. I'm
normally ISP will offer multi-site load balancing using DNS. In terms
of failover, it generally handled the same way. If an earthquake
swallows the first location, the second site's DNS will pick and route
the traffic to the second cluster.
I would talk to your service provider. the smaller shops
not have a
relationship with? Or are the problems I'm describing a thing of the
past?
-Original Message-
From: Filip Hanik - Dev [mailto:[EMAIL PROTECTED]
Sent: Wednesday 10 November 2004 19:14
To: Tomcat Users List; Peter Lin
Subject: Re: Multi-Site Clustering? (hot
actually, you can use filters to capture the response and then use a
filter to dump the whole thing to the outputstream.
What you'll have to do is create your own buffer to hold the content
and not write to either the jspwriter or the printwriter in the
servlet. the tricky part is this. if you
extra lines before ?xml .. can cause some XML parser to fail, so
they should be removed.
peter
On Tue, 09 Nov 2004 20:53:04 -, d~l [EMAIL PROTECTED] wrote:
On 9 Nov 2004 at 20:04, Peter Crowther Peter.Crowther-at-melandra wrote:
Problem summary:
Tomcat 5.0.24 JSP 2.0 SVG example
in this day, most of the servlet containers are about the same in
terms of performance. What matters most is your design and
implementation. there are plenty of sites getting 10million+ page
views a day with tomcat.
who ever told you tomcat is only for lab use is totally clueless.
there's an
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