title: LMDB maximum size of the database for windows
body: <p>When I set the maximum db size to be, for example, 5G, on windows the final db file size will become 5G even I only insert one small piece of data. But on linux it works fine, the final db size is related with how many data I insert into.</p>
  
  <p>Here's the api I used to set maximum db size</p>
  
  <p><code>rc = ::mdb_env_set_mapsize(env, 5 * 1024 * 1024 * 1024);</code></p>
  
  <p>Same for Windows and linux. Do I need to do something different for windows?</p>