title: Firebase functions not triggered on Database write
body: <p>I have this firebase function which is properly deployed for testing on Firebase :</p>
  
  <pre><code>exports.testDataPoint = functions.database.ref('/testDataPoint/{uid}/{id}/')
      .onCreate(event =&gt; {
          if (event.data.exists()) {
              return admin.database().ref("/test/"+event.params.uid+"/accumulate")
              .transaction(current =&gt; {
                  return (current || 0) + event.data.val();
              })
          }
          else{
              return Promise.resolve(true)
          }
      });
  </code></pre>
  
  <p>When I try to write a data of <strong>10000</strong> entries at once the function is not triggered at all. But if the number of entries is around <strong>1000</strong>, function triggers perfectly.
  Here is the script I'm using to write data:</p>
  
  <pre><code>function testGroupWrites() {
      let users = {};
      for (let i = 0; i &lt; 1000; i++) {
          let id = shortId.generate();
          let jobs = {};
          for (let j = 0; j &lt; 10; j++) {
              let uid = shortId.generate();
              console.log(uid);
              jobs[uid] = 1;
          }
          users[id] = jobs;
      }
      db.ref("testDataPoint")
          .set(users)
          .then(() =&gt; {
              console.log("written");
          })
  }
  </code></pre>
  
  <p>Is there any limit to how much data can be written at a point above which function will not gets triggered? I'm testing this scenario, because in my project firebase function will be doing the same thing to calculate values.
  I'm using <em>Admin SDK</em> in my script to write dummy data.</p>