Peter Johnson [http://community.jboss.org/people/peterj] created the discussion "Re: server becomes unresponsive" To view the discussion, visit: http://community.jboss.org/message/644483#644483 -------------------------------------------------------------- Don't run the processes? ;-) I would modify the processes to not use 100% of the CPU. Without knowing anything about these processes (what they do, what they are written in, if you have the source, how they are configured), it is hard to give more specific advice. If you have multiple CPUs on your machine, you could set affinity such that the processes get only a single CPU, that way they won't take up the whole machine. 300 to 500 requests per day? Of did you mean per minute/hour? It all depends on what each request is doing. If each request is to index the entire internet, then your box is woefully underpowered. If each reqeust is a simple "hello world" echo, then you should be able to get 500 requests per second. Since you did not provide any information about what the resusts do, or the different types of requests you have, nor of the processing requirements for each request type, I can't provide any more detailed information than that. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/644483#644483] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]

Peter Johnson [http://community.jboss.org/people/peterj] created the discussion "Re: server becomes unresponsive" To view the discussion, visit: http://community.jboss.org/message/644871#644871 -------------------------------------------------------------- Sounds like the app was poorly designed; a complete redesign is in order. Oh, the 300-500 was users not requests. Go figure! But even if you had a million users, you could still handle that load if users rarely made requests. But even with say 300 users, if each made a request every minute, that would be only 5 requests per second, which should be doable. But that all depends on how processor and database intensive each request is. That all depends. When the CPU hits 100%, have you noticed that is using the CPU? If tha database is use 90% and leaving 10% for the app server, and if every user request needs database access, then moving the database to another system migth not help all that much. The other system will then run at 100% CPU while the two processes are running, so still for that 10-15 minutes you will have the app server waiting for responses from the database server which is already overloaded. What have you done to monitor the system to identify the bottleneck? How familiar are you with performance tuning? Tuning not just the JVM, but the entire system (OS, network, JVM, apps, database, etc). The thing is, performance tuning is very much a black art and is difficult to do using a forum as a communications mechanism (). If you are not comfortable with, or don't know how to do performance tuning, you need to hire a performance expert who can evaluate your entire system and make recommendations. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/644871#644871] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]

Wolf-Dieter Fink [http://community.jboss.org/people/wdfink] created the discussion "Re: server becomes unresponsive" To view the discussion, visit: http://community.jboss.org/message/644935#644935 -------------------------------------------------------------- Good starting points will be different oracle pages: http://java.sun.com/docs/books/performance/ http://java.sun.com/docs/books/performance/ http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html and http://www.javaperformancetuning.com/ http://www.javaperformancetuning.com/ Books are available from i.e. from O'Reilly or safari-books online. 'Java Enterprise performance' is also advisable (but I don't know ATM whether it is available in English). You might also read the articles of  http://community.jboss.org/people/peterj Peter Johnson  here http://www.cmg.org/cgi-bin/search.cgi?q=java+peter+johnson&x=30&y=10 http://www.cmg.org/cgi-bin/search.cgi?q=java+peter+johnson&x=30&y=10 -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/644935#644935] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]