gistfile1.js

    function render() {
        //do stuff
    }     

    mcpool.acquire(function(mcpoolerr, mc) {
       mc.get(cacheKey, function(mcgeterr, cachedResults) {
         if (cachedResults == null) {
           dbpool.acquire(function(dbpoolerr, db) {
             db.query(
               'select field from table where something = ? order by field limit 40',
               [req.query.someValue],
               function(error, queryResults, fields) {
                 dbpool.release(db);
                 mc.set(cacheKey, JSON.stringify(queryResults));
                 render(queryResults);
               }
             );
           });
         } else {
           render(JSON.parse(cachedResults));
         }
         mcpool.release(mc);
       });
     });