127421 over what period of time?
Without a profile it is impossible to say if Tomcat can handle the load. But if the memory consumption and the CPU usage is low (as noted) it is fairly safe to say that Tomcat itself is not the bottle neck.
Quick question, why are you using Apache?
Also what is the time out for the connection in Apache?
Do you get this slow reaction if you are hitting Tomcat directly?
I may be repeating something that was covered because I have not been reading this thread in detail. So sorry if already asked and answered.
Doug
----- Original Message ----- From: "Jeffrey" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
Sent: Saturday, May 07, 2005 10:44 AM
Subject: Re: Tomcat 5 slow, it's in production, please help!
This website has many JSP pages of which each has many JSPF included. I wonder whether or not the system is not be able to handle this kind of setting. But strange thing is that when we experienced the slowness, I looked at the usage of CPU and find that almost 90% of the CPU is idle.
Do anyone know what kind of load a tomcat can handle. I am thinking that maybe a load balancer will help. But I am still puzzled by the fact of low CPU usage at the time of slowness.
From the server status view in tomcat manager, I can see 's Request count: 127421'
--- Jeffrey <[EMAIL PROTECTED]> wrote:---------------------------------------------------------------------I have a apache/tomcat environment that has some problems recently. The environment has the following: 1. Apache 1.3 2. Tomcat 5.0.28 (Max memory 384mb) 3. JDK 1.4.2_06
My apache has MaxClient set to 256 (apache default). The maxThread for tomcat is 500. The site is a database driven site.
It seems working fine when load is low. But when there are more than 150 threads (from the sever status view of the tomcat manager), it's response time is very slow (5 - 10 minutes). I have tested the database connections, they seem responding fairly well.
Interesting thing is that most of time the slow response time only happens when a user login. Once the user login and get the main menu page, the user will get a good response time. Is it related to KeepAlive connections.
Another strange thing is that many threads always show up in the server status view on the tomcat html manager page even though I am sure the request has gone (I tested this by making a request, then close the browser).
My CPU usage is low when the slowdown is experienced (Using the top command on this solaris box which has old solaris operating system 2.6? with 1GB memory.
I set the session timeout time to 5 minutes, but in the session view of tomcat manager, I see message "30 - <40 minutes:136 sessions". How a session that is more than 30 minutes is still there. Maybe I don't understand this message correctly.
Please advice. This is a production machine. Helps are greatly appreciated.
Thanks.
Jeffrey.
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