what happens in jconsole over that period of time? M- ----- Original Message ----- From: "Sai Bobba" <[EMAIL PROTECTED]> To: <users@tomcat.apache.org> Sent: Sunday, November 04, 2007 8:25 PM Subject: Tomcat causing high CPU load
> Hi, > > I'm using the following: > > JDK1.5 > Tomcat 6 > SQL Server 2000 > Server running on Windows 2000 > > The web app deployed consists of: an application form filled in by the > prospective student, a servlet that gets the form parameters > (>60), processes them, and saves the data input by the user to several > tables in the database. Processing of the form data involves applying > testing the data against admission criteria. > When the web ap was first deployed some months ago, we had the problem that > some of the input by the users was too large for the space allocated in the > corresponding column in the db table - this caused SQLExceptions to be > thrown each time this happened. At the same time we noticed that many times > a day the CPU load on the server machine was up at 60% - 90+% - Tomcat was > responsible for this CPU load almost exclusively - the other processes > running on the machine were taking <3%. This meant having to restart Tomcat > several times a day. At first we thought this was related to the db > insertion problem. We fixed the db issue so that no more exceptions are > thrown, but we still find the CPU load up at >60% at least once a day - > Tomcat responsible again. > Another thing I noticed in testing the app was that if after I submitted an > application I hit the 'Back' button on the browser and then submitted again, > app would hang, and the CPU load on the server machine would rise to >60%. I > tried this several times, with the same result each time. However, it was > possible to submit an aplication from a different browser even when the CPU > load was high. Oddly, when I did this test on my local machine I didn't have > this problem. > I hope I've laid out the situation clearly. My searches on the web for this > sort of problem have yielded no solution. > If anybody has had this problem and fixed it, or has an insight into what > the problem might be, I'd greatly appreciate hearing about it! > > Many thanks! > > bob > --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
