This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Why? - It is just the normal operation of a Java program. Since a server gets an unpredictable sequences of requests, a single moment when multiple request Threads need lots of memory to work will cause the JVM to request more memory, thus causing "total" memory to jump.
Now - if your code does not properly free up objects that are no longer needed you MAY be looking at a "memory leak" but detecting that will take more work.
Joined: Sep 20, 2001
Thanks William (Your book helped me pass exam!).
Now the Tomcat status is:
Free memory: 145.72 MB Total memory: 1186.68 MB Max memory: 1186.68 MB
It has been like this for a few hours but I have not got 'out of memory' error yet. I thought when Total memory reached Max memory I would get this error. Maybe I will get this error when Free memory goes to zero.
Author and all-around good cowpoke
Joined: Mar 22, 2000
Having total memory equal max memory simply means that the last JVM request reached the limit. When trying to meet a new memory request that cant be satisfied with existing memory, the JVM always requests a good sized chunk because requesting memory from the operating system is time consuming.