Merge pull request #2 from soualid/master

added statistics about v8 contexts and threads status

Author: mpoeter

lib/index.js

@@ -86,6 +86,41 @@ metrics.registerHistogram(
   internal.bytesReceivedDistribution,
   "Bytes received for a request.");
 
+// server
+metrics.registerGauge(
+    "arango_v8_context{status=\"available\"}",
+    ["server", "v8Context", "available"],
+    "Number of available v8 context.");
+metrics.registerGauge(
+    "arango_v8_context{status=\"busy\"}",
+    ["server", "v8Context", "busy"],
+    "Number of busy v8 context.");
+metrics.registerGauge(
+    "arango_v8_context{status=\"dirty\"}",
+    ["server", "v8Context", "dirty"],
+    "Number of dirty v8 context.");
+metrics.registerGauge(
+    "arango_v8_context{status=\"free\"}",
+    ["server", "v8Context", "free"],
+    "Number of free v8 context.");
+metrics.registerGauge(
+    "arango_v8_context{status=\"max\"}",
+    ["server", "v8Context", "max"],
+    "Number of max v8 context.");
+
+metrics.registerGauge(
+    "arango_threads{status=\"running\"}",
+    ["server", "threads", "running"],
+    "Number of running threads.");
+metrics.registerGauge(
+    "arango_threads{status=\"working\"}",
+    ["server", "threads", "working"],
+    "Number of working threads.");
+metrics.registerGauge(
+    "arango_threads{status=\"blocked\"}",
+    ["server", "threads", "blocked"],
+    "Number of blocked threads.");
+
 function getMetrics() {
   const result = db._query(aql`
     FOR s IN _statisticsRaw