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|Oracle Solaris Tunable Parameters Reference Manual Oracle Solaris 11 Express 11/10|
kstats are data structures maintained by various kernel subsystems and drivers. They provide a mechanism for exporting data from the kernel to user programs without requiring that the program read kernel memory or have superuser privilege. For more information, see kstat(1M) or kstat(3KSTAT).
Note - kstat data structures with system_pages name in the unix module do not report statistics for cachefree. cachefree is not supported, starting in the Solaris 9 release.