| 1 | |
| 2 | # detect if memcached cache is full |
| 3 | |
| 4 | template: memcached_cache_memory_usage |
| 5 | on: memcached.cache |
| 6 | class: Utilization |
| 7 | type: KV Storage |
| 8 | component: Memcached |
| 9 | calc: $used * 100 / ($used + $available) |
| 10 | units: % |
| 11 | every: 10s |
| 12 | warn: $this > (($status >= $WARNING) ? (70) : (80)) |
| 13 | crit: $this > (($status == $CRITICAL) ? (80) : (90)) |
| 14 | delay: up 0 down 15m multiplier 1.5 max 1h |
| 15 | summary: Memcached memory utilization |
| 16 | info: Cache memory utilization |
| 17 | to: dba |
| 18 | |
| 19 | |
| 20 | # find the rate memcached cache is filling |
| 21 | |
| 22 | template: memcached_cache_fill_rate |
| 23 | on: memcached.cache |
| 24 | class: Utilization |
| 25 | type: KV Storage |
| 26 | component: Memcached |
| 27 | lookup: min -10m at -50m unaligned of available |
| 28 | calc: ($this - $available) / (($now - $after) / 3600) |
| 29 | units: KB/hour |
| 30 | every: 1m |
| 31 | info: Average rate the cache fills up (positive), or frees up (negative) space over the last hour |
| 32 | |
| 33 | |
| 34 | # find the hours remaining until memcached cache is full |
| 35 | |
| 36 | template: memcached_out_of_cache_space_time |
| 37 | on: memcached.cache |
| 38 | class: Utilization |
| 39 | type: KV Storage |
| 40 | component: Memcached |
| 41 | calc: ($memcached_cache_fill_rate > 0) ? ($available / $memcached_cache_fill_rate) : (inf) |
| 42 | units: hours |
| 43 | every: 10s |
| 44 | warn: $this > 0 and $this < (($status >= $WARNING) ? (48) : (8)) |
| 45 | crit: $this > 0 and $this < (($status == $CRITICAL) ? (24) : (2)) |
| 46 | delay: down 15m multiplier 1.5 max 1h |
| 47 | summary: Memcached estimation of lack of cache space |
| 48 | info: Estimated time the cache will run out of space \ |
| 49 | if the system continues to add data at the same rate as the past hour |
| 50 | to: dba |