[mongo] Add WiredTiger metrics

checks.d/mongo.py

@@ -62,6 +62,23 @@ class MongoDb(AgentCheck):
         "metrics.repl.buffer.count",
         "metrics.repl.buffer.maxSizeBytes",
         "metrics.repl.buffer.sizeBytes",
+
+        "wiredTiger.cache.maximum bytes configured",
+        "wiredTiger.cache.bytes read into cache",
+        "wiredTiger.cache.pages evicted by application threads",
+        "wiredTiger.cache.pages evicted because they exceeded the in-memory maximum",
+        "wiredTiger.cache.failed eviction of pages that exceeded the in-memory maximum",
+        "wiredTiger.cache.maximum page size at eviction",
+        "wiredTiger.cache.in-memory page splits",
+        "wiredTiger.cache.pages read into cache",
+        "wiredTiger.session.open cursor count",
+        "wiredTiger.session.open session count",
+        "wiredTiger.concurrentTransactions.write.out",
+        "wiredTiger.concurrentTransactions.write.available",
+        "wiredTiger.concurrentTransactions.write.totalTickets"
+        "wiredTiger.concurrentTransactions.read.out",
+        "wiredTiger.concurrentTransactions.read.available",
+        "wiredTiger.concurrentTransactions.read.totalTickets",
     ]
 
     RATES = [

checks/__init__.py

@@ -91,7 +91,7 @@ def normalize(self, metric, prefix=None):
         """Turn a metric into a well-formed metric name
         prefix.b.c
         """
-        name = re.sub(r"[,\+\*\-/()\[\]{}]", "_", metric)
+        name = re.sub(r"[,\+\*\-/()\[\]{}\s]", "_", metric)
         # Eliminate multiple _
         name = re.sub(r"__+", "_", name)
         # Don't start/end with _
@@ -759,7 +759,7 @@ def normalize(self, metric, prefix=None, fix_case=False):
             if prefix is not None:
                 prefix = self.convert_to_underscore_separated(prefix)
         else:
-            name = re.sub(r"[,\+\*\-/()\[\]{}]", "_", metric)
+            name = re.sub(r"[,\+\*\-/()\[\]{}\s]", "_", metric)
         # Eliminate multiple _
         name = re.sub(r"__+", "_", name)
         # Don't start/end with _