Added total up-time to pool stats

Author: cjbj

lib/pool.js

@@ -238,6 +238,7 @@ function logStats() {
   }
 
   console.log('\nPool statistics:');
+  console.log('...total up time (milliseconds):', Date.now() - self._createdDate);
   console.log('...total connection requests:', self._totalConnectionRequests);
   console.log('...total requests enqueued:', self._totalRequestsEnqueued);
   console.log('...total requests dequeued:', self._totalRequestsDequeued);
@@ -307,6 +308,9 @@ function extend(pool, poolAttrs, oracledb) {
       _logStats: { // output pool stats
         value: logStats
       },
+      _createdDate: {
+        value: Date.now()
+      },
       _totalConnectionRequests: { // total number of pool.getConnection requests
         value: 0,
         writable: true