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Hi all, I've some application which will do much I/O disk. While this application is running the memory usage of system is continuously increasing. After stopping my process , no memory usage increased. But leaked/increased memory was not released back upon my application exit.This proves that there is no potential memory leaks in my process. Also /proc/<PID>/status file contents are not changing from start to end. Where is leaked memory was gone even though my application terminates ? I assumed that memory reserved for kernel buffer cache is not releasing back. Correct me if assumption is wrong. So i wanted test Linux Kernel buffer cache memory allocation/release, I take Linux command line utility 'du' Before running this utility , the 'free -m' command output is: total used free shared buffers cached Mem: 1004 79 924 0 1 21 -/+ buffers/cache: 57 946 Swap: 1992 7 1985 I ran du command on / directory.It had given the output and exited.Now free command output is: total used free shared buffers cached Mem: 1004 166 837 0 37 21 -/+ buffers/cache: 106 897 Swap: 1992 7 1985 106-57=49M is not released back. The same behavior I observed with my application. I stuck up at this stage to analyze the issue. Is really Linux Kernel is taken the physical memory for buffering and not releasing in back ? If yes , how long it will hold ? Regards, Ravikumar |
