title: Need to troubleshoot Bigtable read latency
body: <p>We have a GKE containerised Internet facing application serving the incoming traffic/request to Bigtable via a load balancer (ssl termination at Nginx). Requests are synchronous in nature.
  We are using C++ Bigtable client library to interact with Bigtable.
  See-  <a href="https://github.com/googleapis/google-cloud-cpp" rel="nofollow noreferrer">https://github.com/googleapis/google-cloud-cpp</a></p>
  <p>Most of the &quot;GET&quot; calls are taking 40-50ms which seems to be quite unusual. I have investigated the Bigtable &quot;Key Visualizer Tool&quot; as well and don't see any issue with Rowkey and schema.</p>
  <p>In order to confirm that Bigtable is working fine from the Pod, I ran a sample 'hello world' and tried to fetch the response for the sample Rowkeys synchronously and most of the &quot;GET&quot; calls are taking 4-5ms. Now, I'm quite unsure that what is making the &quot;GET&quot; calls over same Rowkeys take so long to return the response if called via application.</p>
  <p>Network latency was something to consider but then it would delay the response time for the sample Python 'Hello World&quot; code as well. Also, Bigtable cluster and GKE nodes are in same zone.</p>
  <p>Any idea what areas should I be looking into for troubleshooting the same?</p>