title: maxConnectionPoolSize : neo4j-javascript-driver
body: <p>What is a realistic value for the configuration property "maxConnectionPoolSize" ? I am using bolt and neo4j-javascript-driver. How many concurrent connections it can sustain ?</p>
  
  <p>At the moment when i do multiple concurrent POST requests using REST API, i get following error:</p>
  
  <pre><code>Neo4jError: There are no available threads to serve this request at the moment. You can retry at a later time or consider increasing max thread pool size for bolt connector(s).
  </code></pre>
  
  <p>Following is my driverConfig:</p>
  
  <pre><code>    driverConfig: {
        maxConnectionLifetime: 3 * 60 * 60 * 1000, // 3 hours
        maxConnectionPoolSize: 100,      
      },
  </code></pre>