title: SQLite simultaneous reading and writing
body: <p>I've read a lot of topics, but can't figure out answer for question: is it possible to read and write simultaneous?</p>
  
  <p>I have background thread that updates some data and UI needs small piece of data stored in DB. So in UI thread SELECT operation is performed. But it blocks when update is in progress. As result, UI freezes for several seconds.</p>
  
  <p>Does anyone has success in reading from DB when writing?</p>
  
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  <p>Its possible to read and write to DB on iPhone. Does the reason of such difference is in synchronious implementation of wrapper on native sqlite functions?</p>