title: Lucene index updation and performance
body: <p>I am working on a job portal site and have been using Lucene for job search functionality.
  Users will be posting a number jobs on our site on a daily basis.We need to make sure that new job posted is searchable on the site as soon as possible.
  In this context, how do I update Lucene index when a new job is posted or when an existing job is edited?
  Can lucene index updating and search work in parallel?</p>
  
  <p>Also,can I know any tips/best practices with respect to Lucene indexing,optimizing,performance etc?</p>
  
  <p>Appreciate ur help!</p>
  
  <p>Thanks!</p>