Use postgres pool configuration to have the same configuration for all renderers.

config/environments/development.js.example

@@ -137,15 +137,7 @@ var config = {
         //If enabled, MVTs will be generated with PostGIS directly, instead of using Mapnik,
         //PostGIS 2.4 is required for this to work
         //If disabled it will use Mapnik MVT generation
-        usePostGIS: false,
-        dbPoolParams: {
-              // maximum number of resources to create at any given time
-              size: 16,
-              // max milliseconds a resource can go unused before it should be destroyed
-              idleTimeout: 3000,
-              // frequency to check for idle resources
-              reapInterval: 1000
-          }
+        usePostGIS: false
       },
       mapnik: {
           // The size of the pool of internal mapnik backend
@@ -261,16 +253,7 @@ var config = {
               src: __dirname + '/../../assets/default-placeholder.png'
           }
       },
-      torque: {
-          dbPoolParams: {
-              // maximum number of resources to create at any given time
-              size: 16,
-              // max milliseconds a resource can go unused before it should be destroyed
-              idleTimeout: 3000,
-              // frequency to check for idle resources
-              reapInterval: 1000
-          }
-      }
+      torque: {}
     }
     // anything analyses related
     ,analysis: {