1 files changed, 48 insertions, 0 deletions
diff --git a/health/health.d/memcached.conf b/health/health.d/memcached.conf
new file mode 100644
index 0000000..2a2fe4b
--- /dev/null
+++ b/health/health.d/memcached.conf
@@ -0,0 +1,48 @@
+
+# detect if memcached cache is full
+
+ template: memcached_cache_memory_usage
+       on: memcached.cache
+    class: Utilization
+     type: KV Storage
+component: Memcached
+     calc: $used * 100 / ($used + $available)
+    units: %
+    every: 10s
+     warn: $this > (($status >= $WARNING)  ? (70) : (80))
+     crit: $this > (($status == $CRITICAL) ? (80) : (90))
+    delay: up 0 down 15m multiplier 1.5 max 1h
+     info: cache memory utilization
+       to: dba
+
+
+# find the rate memcached cache is filling
+
+ template: memcached_cache_fill_rate
+       on: memcached.cache
+    class: Utilization
+     type: KV Storage
+component: Memcached
+   lookup: min -10m at -50m unaligned of available
+     calc: ($this - $available) / (($now - $after) / 3600)
+    units: KB/hour
+    every: 1m
+     info: average rate the cache fills up (positive), or frees up (negative) space over the last hour
+
+
+# find the hours remaining until memcached cache is full
+
+ template: memcached_out_of_cache_space_time
+       on: memcached.cache
+    class: Utilization
+     type: KV Storage
+component: Memcached
+     calc: ($memcached_cache_fill_rate > 0) ? ($available / $memcached_cache_fill_rate) : (inf)
+    units: hours
+    every: 10s
+     warn: $this > 0 and $this < (($status >= $WARNING)  ? (48) : (8))
+     crit: $this > 0 and $this < (($status == $CRITICAL) ? (24) : (2))
+    delay: down 15m multiplier 1.5 max 1h
+     info: estimated time the cache will run out of space \
+           if the system continues to add data at the same rate as the past hour
+       to: dba