After the linux and jboss are started, memery is 166M free.
I have been viewing for several hours, there is no big changes. Everything is ok.
However after the system is running for more than 12 hours or so, memery is only 11M free. Then I shut down Jboss and start it again, it is still 11M free. It will be 166M free unless I restart Linux.
I am not sure this is Linux's problem or Jboss's problem.
Any helps are appreciated.
It is not a problem at all.
Working out what is using memory in Linux is very difficult.
The chances are that the operating system has used up the memory to cache files that have been accessed on the filesystem, as memory is required the cached data will be released so that it can be used for other applications.