"sect2" id="RUNTIME-CONFIG-RESOURCE-BACKGROUND-WRITER"><div class="titlepage"><div><div><h3 class="title">20.4.5. Background Writer <a href="#RUNTIME-CONFIG-RESOURCE-BACKGROUND-WRITER" class="id_link">#</a></h3></div></div></div><p>
      There is a separate server
      process called the <em class="firstterm">background writer</em>, whose function
      is to issue writes of <span class="quote">“<span class="quote">dirty</span>”</span> (new or modified) shared
      buffers.  When the number of clean