| Popis: |
The amount of free memory have a great influence on system stability because out of memory occurs performance degradation phenomena, unexpected process terminations and so on. Thus, It is an important administration task to design the memory utilization plan based on the characteristics of the processes. However, in sometimes, processes demand a large amount of main memory rapidly and unexpectedly due to various reasons (e.g. memory leaks, malicious programs, denial of service attacks to network servers). These unexpected large memory demands cause out of memory and make the systems unstable. Existing memory management mechanisms are somewhat effective to prevent such out of memory with the unexpected memory demands. However, the existing mechanisms have several problems arising from the difficulty in the discrimination between the expected and unexpected large memory demands. As a solution, we propose a new memory resource management method at the operating system level. The proposed method utilizes memory allocation rate to detect unexpected large memory demands, i.e., the operating system with the proposed methods regard the processes that demand memory rapidly as offending processes. In this paper, we will discuss the problem of existing memory management mechanism and describe the proposed method and show the evaluation experiments. |
