How many CPU's/Cores on the machines? Try taking a few Thread dumps and see what's taking up the CPU.
Alternatively, if its not a production App, go for profiling and see what's going on inside. thanks ashish On Mon, Sep 20, 2010 at 6:07 PM, Kumar Abhishek <[email protected]> wrote: > Hi, > > I am using MINA for client-server based communication on my Centos machine > both of which reside on same machine. The architecture is the following: > > Client has a single SocketConnector and manages a pool of active IOSession > objects which can be utilized by any incoming request. This SocketConnector > is invoked by tomcat once HTTP POST request comes to a particular url hosted > on the machine. The client picks up an active session and fires the request > to the socket server. I am using executor Executors.newCachedThreadPool() so > that the request doesn't execute on IO thread. > > On the server end I have a socket server which uses a executor to process > incoming IO request and send back response. The typical request processing > involves db queries, sending sms on smpp server and returning back the > result to the client. Typically this request processing can take upto 40secs > to finish up(yeah I know its slow as sms sending and delivery report is to > be proceesed) > > What I observe is the following even on a single request the CPU usage of > tomcat java process shoots up very high which is very worrying given the > system is expected to see more traffic in coming days. I have also tried to > forcefully bring down the request processing time to 3secs by ignoring a few > steps just to diagnose the problem, however there is no improvement, its > just that cpu shoots for a smaller period i.e. from 40 secs to 3 secs. Any > suggestions will be highly appreciated. > > Thanks ! > Best Regards, > Abhishek > -- thanks ashish Blog: http://www.ashishpaliwal.com/blog My Photo Galleries: http://www.pbase.com/ashishpaliwal
