Does Struts 2 have any memory issues

I have开发者_如何学Python a webapp developed with struts2 deployed in tomcat 5.5. The server has other applications deployed in it. But the app created with struts2 is very slow. Any ideas? How does Struts 2 handle object creation? And is there anything I can do on the tomecat server..

How slow is it? What are you doing? are you sure it is Struts 2 that is slow and not your application code? Did you do any profiling? What were the results?

Check this out: http://struts.apache.org/2.2.1/docs/performance-tuning.html

I found serving the static content from a folder increased the speed.

Well few details are really required for some one to answer your question in more good way

1. Which Struts2 version you are using

2. At which place/part do you think application is slow

as per my experience there are certain areas where Struts2 have known problems, OGNL in itself sometime creates problem since this is the part of the framework which took most of the time, this has been known to fixed in 3.x version of OGNL so you can get new jar of OGNL and than can test your application. Second use some profiler and it will help you to catch the culprit like any thread blocking etc.

What OS is Tomcat running on?

If it's Linux, you may have run into a lack of entropy issue. If this command returns something less than 200, it could explain your issue:

cat /proc/sys/kernel/random/entropy_avail

If it is low (or watch during startup/making requests), try pointing /dev/random to /dev/urandom. (Not for secure Production, but to test in Dev should be fine):

mv /dev/random /dev/random.orig
ln -s /dev/urandom /dev/random

And try starting Tomcat again.