Increase poolSize depending on multiplier (#1552)

* This didn't seem to help in a direct test on production but doing since it's the logical thing to do with our current process manager.

NOTE(S):
* We don't currently have clustering management in the project itself but may at some point in the future so this could eventually use some improvement. Trying to keep this simple at start for everyone.
* Go back to the original multiplier
* This value is per thread otherwise it would be huge in each thread. Durr.
* Try triple multiplier
* Since commit notes said it didn't seem to help let's try tripling the multiplier

Applies to #1548

app.js

@@ -66,14 +66,15 @@ var _ = require('underscore');
 var findSessionData = require('./libs/modifySessions').findSessionData;
 
 var dbOptions = {};
+var defaultPoolSize = 5;
 if (isPro) {
   dbOptions = {
     secondaryAcceptableLatencyMS: 15,
-    poolSize: 5
+    poolSize: defaultPoolSize * 3
   }
 } else {
   dbOptions = {
-    poolSize: 5,
+    poolSize: defaultPoolSize,
     reconnectTries: 30,
     reconnectInterval: 1000
   }