Swappinessswappiness is a parameter which sets the kernel's balance between reclaiming pages from the page cache and swapping process memory. The default value is 60. If you want kernel to swap out more process memory and thus cache more file contents increase the value. Otherwise, if you would like kernel to swap less decrease it.
vfs_cache_pressureControls the tendency of the kernel to reclaim the memory which is used for caching of directory and inode objects. At the default value of vfs_cache_pressure = 100 the kernel will attempt to reclaim dentries and inodes at a "fair" rate with respect to pagecache and swapcache reclaim. Decreasing vfs_cache_ overcommit_memoryControls overcommit of system memory, possibly allowing processes to allocate (but not use) more memory than is actually available.
overcommit_ratioMemory allocation limit = swapspace + physmem * (overcommit_ratio / 100) swapspace = total size of all swap areas IBM nmon http://www.ibm.com/developerworks/aix/library/au-analyze_aix/ |
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