title: Tools for finding solr performance issues
body: <p>I have a solr server, which runs into performance issue at random. The queries which result in longer qtimes, dont take the same time if I try those once again.
  The performance issue even arises sometimes when the load on server is not high.</p>
  
  <p>So I wanted to know if there are any tools available or are there any options in solr available to pin-point the problem leading to performance issues.</p>
  
  <p>some of the parameters in solrconfig.xml used are -</p>
  
  <pre><code>&lt;filterCache class="solr.LRUCache" size="1024" initialSize="512" autowarmCount="1000"/&gt;
  &lt;queryResultCache class="solr.LRUCache" size="512" initialSize="128" autowarmCount="0"/&gt;
  &lt;documentCache class="solr.LRUCache" size="1024" initialSize="512" autowarmCount="0"/&gt;
  &lt;enableLazyFieldLoading&gt;true&lt;/enableLazyFieldLoading&gt;
  &lt;queryResultWindowSize&gt;30&lt;/queryResultWindowSize&gt;
  &lt;queryResultMaxDocsCached&gt;100&lt;/queryResultMaxDocsCached&gt;
  &lt;HashDocSet maxSize="10000" loadFactor="0.75"/&gt;
  </code></pre>