> From: Tim Funk <funkman () joedog ! org> > Subject: Re: [Q] Is it safe to create threads in Tomcat web-apps?
> You can create threads all day in tomcat, but here are the importnatn things > to consider: > - WHY! Are threads really the correct solution? > - And last but not least: WHY! Are threads really the correct solution? I'm getting the impression that you think multiple threads are never the right answer. :) That's not necessarily true. Suppose that your response to a request contains three steps which are independant of one another; in order to deliver a faster response time, you'd like to execute them concurrently. If these three steps are CPU-bound, then the amount of benefit really depends on the machine; you need multiple CPUs so that the scheduler can run the different threads on different CPUs. With a single CPU, you're not likely to see much benefit. However, if the three steps are IO-bound, using multiple threads to run them concurrently can lead to a big improvement. Most of the time spent doing IO is spent waiting. (Particularly if the IO is network IO, a "sub-request" to a remote site, for example). If the idle times occur concurrently instead of serially, you'll certainly do better. -- Steve --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
