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+
+# you can disable an alarm notification by setting the 'to' line to: silent
+
+# Calculate the base trigger point for the load average alarms.
+# This is the maximum number of CPU's in the system over the past 1
+# minute, with a special case for a single CPU of setting the trigger at 2.
+ alarm: load_trigger
+ on: system.load
+ os: linux
+ hosts: *
+ calc: ($active_processors == nan or $active_processors == inf or $active_processors < 2) ? ( 2 ) : ( $active_processors )
+ units: cpus
+ every: 1m
+ info: trigger point for load average alarms
+
+# Send alarms if the load average is unusually high.
+# These intentionally _do not_ calculate the average over the sampled
+# time period because the values being checked already are averages.
+ alarm: load_average_15
+ on: system.load
+ os: linux
+ hosts: *
+ lookup: max -1m unaligned of load15
+ units: load
+ every: 1m
+ warn: $this > (($status >= $WARNING) ? (1.75 * $load_trigger) : (2 * $load_trigger))
+ crit: $this > (($status == $CRITICAL) ? (3.5 * $load_trigger) : (4 * $load_trigger))
+ delay: down 15m multiplier 1.5 max 1h
+ info: fifteen-minute load average
+ to: sysadmin
+
+ alarm: load_average_5
+ on: system.load
+ os: linux
+ hosts: *
+ lookup: max -1m unaligned of load5
+ units: load
+ every: 1m
+ warn: $this > (($status >= $WARNING) ? (3.5 * $load_trigger) : (4 * $load_trigger))
+ crit: $this > (($status == $CRITICAL) ? (7 * $load_trigger) : (8 * $load_trigger))
+ delay: down 15m multiplier 1.5 max 1h
+ info: five-minute load average
+ to: sysadmin
+
+ alarm: load_average_1
+ on: system.load
+ os: linux
+ hosts: *
+ lookup: max -1m unaligned of load1
+ units: load
+ every: 1m
+ warn: $this > (($status >= $WARNING) ? (7 * $load_trigger) : (8 * $load_trigger))
+ crit: $this > (($status == $CRITICAL) ? (14 * $load_trigger) : (16 * $load_trigger))
+ delay: down 15m multiplier 1.5 max 1h
+ info: one-minute load average
+ to: sysadmin