title: Facing latency issues while fetching data in Spanner table
body: <p>I have few spanner tables where I'm facing latency issue while fetching rows through API's. So we are using secondary index for multiple tables, as it improves the performance. We are using around 50 spanner nodes and average utilisation is around 60% and the query being performed are on top of secondary index. Spanner table has 16 secondary index. With all this functionality on place, we are still facing latency issue as query took around 37 seconds to complete. Query is not the complicated one, just have one filter condition.
  I don't want what's going wrong in my case.</p>