#pmieconf-rules 1
# 

rule	filesys.buffer_cache
	default	= "$rule$"
	predicate =
"some_host (
  ( (kernel.all.io.lread $hosts$
			- kernel.all.io.bread $hosts$)
	/ kernel.all.io.lread $hosts$ ) < $threshold$ / 100
  && kernel.all.io.lread $hosts$ > 30 * 16 Kbytes/sec
)"
	enabled	= no
	version	= 1
	help	=
"Some file system read activity (at least 30 x 16 Kbyte logical reads
per second), and the read hit ratio in the buffer cache is below
threshold percent.";

string	rule
	default	= "low read hit ratio in buffer cache"
	modify	= no
	display	= no;

percent	threshold
	default	= 80
	help	=
"The minimum acceptable buffer cache read hit ratio, expressed as a
percentage.  Values may be in the range 0 (nothing is read from the
cache and poor performance is expected) to 100 (all reads come from
the cache, no disk I/O required and good performance expected).";

string	action_expand
	default	= "%v%@%h"
	display	= no
	modify	= no;