Red Hat Enterprise Linux 5 Administration Unleashed

424CHAPTER 21Monitoring and Tuning the KernelLISTING 21.1Current State of Memory from /proc/meminfoMemTotal: 2057004 kBMemFree:42468 kBBuffers: 177332 kBCached:973368 kBSwapCached:0 kBActive: 1060956 kBInactive: 796132 kBHighTotal:0 kBHighFree:0 kBLowTotal: 2057004 kBLowFree:42468 kBSwapTotal: 2031608 kBSwapFree: 2031480 kBDirty:44 kBWriteback:0 kBAnonPages: 698652 kBMapped:122272 kBSlab:105120 kBPageTables: 29852 kBNFS_Unstable: 0 kBBounce:0 kBCommitLimit: 3060108 kBCommitted_AS: 1436088 kBVmallocTotal: 34359738367 kBVmallocUsed: 1376 kBVmallocChunk: 34359736971 kBHugePages_Total: 0HugePages_Free: 0HugePages_Rsvd: 0Hugepagesize: 2048 kBOther virtual /proc files of interest include the following:. /proc/cpuinfo: Information about the system’s processors such as how many physicalprocessors exist and how many processor cores exist.. /proc/cmdline: Boot parameters passed to the kernel at boot time.. /proc/sys/: Directory containing parameters that can be modified by sysctl. Referto the “Using sysctl to Change Values” section for details.. /proc/vm/: Directory containing virtual memory management configuration. The“Optimizing Virtual Memory” section later in this chapter discusses how to modifythe virtual files in /proc/sys/vm/ to configure how the kernel manages virtualmemory.