Tomcat在我的VM上运行缓慢，但在Eclipse中却没有

Question

I have a webapp that was previously deployed like this on my VM :

• One War containing the core
• JAR of all Dependancies were given to Tomcat by adding them in CLASSPATH

=> My application took around 1 min to start

I am working on apply some "best practices" on that web app, and I firstly work on the dependency inclusion. Now the webapp looks like this :

• One War containing the core (WEB-INF/classes) and all dependencies (WEB-INF/lib)

In my Eclipse, there's no lag when starting the server, it takes around 2 mins. But on my VM, it now takes around 5 mins.

I would like to know if the old webapp deployment was a good practice ? And if it's normal to have that long startup time (for me).

Thanks.

Answer 1

If you are starting tomcat on a headless server, it can take a long time to gather enough entropy for the SecureRandom which generates sessionIds. This should however only affect startup. You can read more about How do I make Tomcat startup faster here.

Otherwise you have to look at the CPU and memory utilization, and enable Info/debug logging so you can see where Tomcat uses the time.

Answer 2

In my Eclipse I modified eclipse.ini as -Xms512m -Xmx2048m -XX:MaxPermSize=2048m

and In tomcat Attributes in eclipse I modified, -Xms512m -Xmx1024m -XX:PermSize=1024m -XX:MaxPermSize=1024m

///My machine having 8GB of RAM