title: Wordpress woocomerce graphql failing
body: <p>After importing lots of products to my WordPress Woocomerce store, GraphQL started to fail. Anyone know how I can fix this problem?</p>
  <pre><code>ERROR #gatsby-source-wordpress_111007 
  
  gatsby-source-wordpress  Request failed with status code 500
  
  Your WordPress server is either overloaded or encountered a PHP error.
  
  Enable WordPress debugging by adding the following to your wp-config.php file:
  
  define(&quot;WP_DEBUG&quot;, true);
  define(&quot;WP_DEBUG_LOG&quot;, true);
  define(&quot;GRAPHQL_DEBUG&quot;, true);
  
  (See https://wordpress.org/support/article/debugging-in-wordpress/ for more info)
  
  Then run another build before checking your WordPress instance's debug.log file for errors.
  
  If you don't see any errors in debug.log:
  
  Try reducing the requestConcurrency for content updates or the previewRequestConcurrency for previews, and/or
  reducing the schema.perPage option:
  
  {
    resolve: 'gatsby-source-wordpress',
    options: {
      schema: {
        perPage: 20, // currently set to 100
        requestConcurrency: 5, // currently set to 50
        previewRequestConcurrency: 2, // currently set to 5
      }
    },
  }
  </code></pre>