# Resource alerts for a low-spec home server.
# Overrides stock alerts where thresholds differ; baseline RAM use is ~80%, so stock 80/90% would fire constantly.

# RAM: warn at >92%, crit at >95% — by then less than ~200 MB free.
 alarm: ram_in_use
    on: system.ram
 class: Utilization
  type: System
component: Memory
  calc: $used * 100 / ($used + $cached + $free + $buffers)
 units: %
 every: 10s
  warn: $this > 92
  crit: $this > 95
 delay: down 5m multiplier 1.5 max 1h
summary: System memory utilization
   info: System memory utilization (used / total, excluding reclaimable cache)
    to: sysadmin

# CPU: replace stock 10min_cpu_usage with two windowed alerts.
 alarm: 10min_cpu_usage
    on: system.cpu
enabled: no

 alarm: cpu_warn_30m
    on: system.cpu
 class: Utilization
  type: System
component: CPU
lookup: average -30m unaligned of user,system,softirq,irq,guest,guest_nice,nice
 units: %
 every: 1m
  warn: $this > 80
 delay: down 30m multiplier 1.5 max 2h
summary: Sustained CPU load (30m avg)
   info: Average CPU utilization over the last 30 minutes
    to: sysadmin

 alarm: cpu_crit_15m
    on: system.cpu
 class: Utilization
  type: System
component: CPU
lookup: average -15m unaligned of user,system,softirq,irq,guest,guest_nice,nice
 units: %
 every: 1m
  crit: $this > 95
 delay: down 30m multiplier 1.5 max 2h
summary: High CPU load (15m avg)
   info: Average CPU utilization over the last 15 minutes
    to: sysadmin

# Disk: warn at >75%, crit at >90% on every mounted filesystem.
 template: disk_space_usage
       on: disk.space
    class: Utilization
     type: System
component: Disk
     calc: $used * 100 / ($avail + $used)
    units: %
    every: 1m
     warn: $this > 75
     crit: $this > 90
    delay: down 15m multiplier 1.5 max 1h
  summary: Disk space utilization
     info: Disk space utilization on ${label:mount_point}
       to: sysadmin