Finding Memory Usage in Java

Question

Following is the scenario i need to solve. I have struck with two solutions.

I need to maintain a cache of data fetched from database to be shown on a Swing GUI. Wheneve

Answer 1

I've only used the first method for similar task and it was OK.

One thing you should note, for both methods, is to implement some kind of debouncing - i.e. once you recognize you've hit 70% of memory, wait for a minute (or any other time you find appropriate) - GC can run at that time and clean up lots of memory.

If you implement a Runtime.freeMemory() graph in your system you'll see how the memory is constantly going up and down, up and down.