from the book effective enterprise java anonymous wrote : In order to maintain a system that?s as scalable as possible, the container seeks to take on resource management as part of its duties. It does this because, as a unifying force across all sorts of different programs and enterprise systems, the container often has a better picture of what the overall resource needs are, as opposed to your code?s rather localized view of the world. | But now you start firing up threads from your servlets. Because the servlet specification provides no way for a servlet developer to integrate with the servlet container?s thread-management scheme, these threads are, by definition, outside the servlet container?s control. So if the system administrator sets a thread pool limit of N threads in the servlet container because he?s figured out, after much tuning and testing, that N is the optimal number for this particular container and platform, the underlying virtual machine is actually running N + 1 threads-the N threads the servlet container knows about, and the 1 that it doesn?t, your servlet?s thread. Suddenly, you?re past the point of optimal usage, and starting down the road of diminishing returns. If that ?1? becomes ?2? or more, this could very quickly get into a situation where the thread-switching time outnumbers the actual work time
Now this quote relates to servlets specifically, but the main idea is the same. If I configure the container to work with N threads, and I start adding threads manually - the optimization I conducted is now lost... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3862379#3862379 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3862379 ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
