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Thread: TOMCAT web server optimization
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TOMCAT web server optimization
Scenario: We put load on tomcat (basically a simple http request) and in response an http response sends 1 to show success.
Executor and Connector configuration (TOMCAT 6) with java version 1.4.2:
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
maxThreads="300" minSpareThreads="100" maxIdleTime="120000" />
<Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1"
Load Testing and results:
100 users hit once we get 23 tps at max
100 users hit thrice with no gap we get 250 tps.Linux is basically a simple operating system, but you have to be a genious to understand the simplicaity - Dennis Ritchie
You want to reach 1000 TPS serving what? Static webpages? JSP pages? How are you generating the load? What kind of system is this running on?
thanks coopstah13 for your reply
we are generating load by sending simple http requests to our server.
we want to reach 1000 tps serving static webpages.
I am stuck here would really appreciate your help.Would be waiting for your responseLinux is basically a simple operating system, but you have to be a genious to understand the simplicaity - Dennis Ritchie
What are you using to drive the load? It is possible that what you are using to drive the load is inadequate to reach 1000 TPS. What about the machine tomcat is running on, it is possible it is not powerful enough to serve 1000 TPS. Are you monitoring CPU utilization, disk IO rate, and other performance related things on the tomcat server?
Welll we have 8GB of ram and core 2 duo system serving static pages.
We cannot achieve more than 25 requests at one time.Even with a html
page simple returining 1 and doing nothing else.
I have increased accept count ,minsparethread count, but no success
About thread dump i dont know please explain i would be very thankful.
I have not used nio connector , the default one.
i have played with accept count , minSparethread count,
maxThread count ..i have read the whole documentation time and again .
Increased heap size to 1 GB .
Would appreciate a prompt reply , consider we are serving a page with nothing just
displaying helloworldLinux is basically a simple operating system, but you have to be a genious to understand the simplicaity - Dennis Ritchie
we send a request for simple html page and server returns 1 in case of success.
Well we have 8GB of ram and core 2 duo system serving static pages.so they must achieve 1000 tps.
Well CPU utilization is not the issue at hand,as we have conducted load testing using HP load runner.No network or cpu utilization issue.
Is it not possible that you share settings for a high load server.And in general with good CPU and RAM how many static pages request tomcat can handle at maximum.
tested tomcat with jmeter for 1000 threads with ramp up period of 20s.
gets 100%cpu,memory usage was ok
So you are saying that you are running a load test with jmeter and the server is CPU bound? You cannot achieve anything more once you are bound by any hardware. Once a resource is capped, particularly CPU or disk, there is nothing you can do to increase throughput except add more hardware, unless you can make modifications to your software, but this isn't the case for you since you aren't serving up a java application, you are only serving static web pages.
A 2 CPU system isn't that powerful these days. If I have time I will try to see what I can get for throughput on a 2 CPU system.
Also, I recommend watching the output of vmstat on the server. I am guessing you will see a high amount of threads in the 'r' column, which means they are waiting on the CPU.