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alarm: used_ram_to_ignore
on: system.ram
calc: ($zfs.arc_size.arcsz = nan)?(0):($zfs.arc_size.arcsz)
every: 10s
info: the amount of memory that is reported as used, but it is actually capable for resizing itself based on the system needs (eg. ZFS ARC)
alarm: ram_in_use
on: system.ram
# calc: $used * 100 / ($used + $cached + $free)
calc: ($used - $used_ram_to_ignore) * 100 / ($used - $used_ram_to_ignore + $cached + $free)
units: %
every: 10s
warn: $this > (($status >= $WARNING) ? (80) : (90))
crit: $this > (($status == $CRITICAL) ? (90) : (98))
delay: down 15m multiplier 1.5 max 1h
info: system RAM usage
to: sysadmin
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