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+.Dd September 20, 2005
+.Dt purge 8
+.Sh NAME
+.Nm purge
+.Nd force disk cache to be purged (flushed and emptied)
+.Sh SYNOPSIS
+.Nm purge
+.Sh DESCRIPTION
+.Nm Purge
+can be used to approximate initial boot conditions with a cold disk buffer cache for performance analysis. It does not affect anonymous memory that has been allocated through malloc, vm_allocate, etc.
+.Pp
+.Sh SEE ALSO
+.Xr sync 8 ,
+.Xr malloc 3