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# you can disable an alarm notification by setting the 'to' line to: silent
alarm: ram_in_use
on: system.ram
class: Utilization
type: System
component: Memory
host labels: _os=linux
calc: $used * 100 / ($used + $cached + $free + $buffers)
units: %
every: 10s
warn: $this > (($status >= $WARNING) ? (80) : (90))
crit: $this > (($status == $CRITICAL) ? (90) : (98))
delay: down 15m multiplier 1.5 max 1h
summary: System memory utilization
info: System memory utilization
to: sysadmin
alarm: ram_available
on: mem.available
class: Utilization
type: System
component: Memory
host labels: _os=linux
calc: $avail * 100 / ($system.ram.used + $system.ram.cached + $system.ram.free + $system.ram.buffers)
units: %
every: 10s
warn: $this < (($status >= $WARNING) ? (15) : (10))
delay: down 15m multiplier 1.5 max 1h
summary: System available memory
info: Percentage of estimated amount of RAM available for userspace processes, without causing swapping
to: silent
alarm: oom_kill
on: mem.oom_kill
host labels: _os=linux
lookup: sum -30m unaligned
units: kills
every: 5m
warn: $this > 0
delay: down 10m
summary: System OOM kills
info: Number of out of memory kills in the last 30 minutes
to: silent
## FreeBSD
alarm: ram_in_use
on: system.ram
class: Utilization
type: System
component: Memory
host labels: _os=freebsd
calc: ($active + $wired + $laundry + $buffers) * 100 / ($active + $wired + $laundry + $buffers + $cache + $free + $inactive)
units: %
every: 10s
warn: $this > (($status >= $WARNING) ? (80) : (90))
crit: $this > (($status == $CRITICAL) ? (90) : (98))
delay: down 15m multiplier 1.5 max 1h
summary: System memory utilization
info: System memory utilization
to: sysadmin
alarm: ram_available
on: mem.available
class: Utilization
type: System
component: Memory
host labels: _os=freebsd
calc: $avail * 100 / ($system.ram.free + $system.ram.active + $system.ram.inactive + $system.ram.wired + $system.ram.cache + $system.ram.laundry + $system.ram.buffers)
units: %
every: 10s
warn: $this < (($status >= $WARNING) ? (15) : (10))
delay: down 15m multiplier 1.5 max 1h
summary: System available memory
info: Percentage of estimated amount of RAM available for userspace processes, without causing swapping
to: silent
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