title: MongoDB - serverStatus was very slow
body: <p>When I run a multi-thread program which runs about 50 threads, and in each thread there are database operations, mongodb runs too slow and then service will be stopped. in Mongodb log I see this message:</p>
  
  <pre><code>2017-12-13T09:24:50.226+0330 I COMMAND  [ftdc] serverStatus was very slow: { after basic: 71, after asserts: 307, after backgroundFlushing: 358, after connections: 622, after dur: 653, after extra_info: 915, after globalLock: 977, after locks: 998, after network: 1008, after opLatencies: 1008, after opcounters: 1008, after opcountersRepl: 1008, after repl: 1030, after security: 1030, after storageEngine: 1061, after tcmalloc: 1293, after wiredTiger: 1627, at end: 2498 }
  </code></pre>
  
  <p>This is my thread code:</p>
  
  <pre><code>def processor(*data):
      for item in data[0]:
          try:
              col_articles_data.update({'_id': item['id']}, {'$set': {'processed': True}})
          except:
              Debug.PrintException()
  </code></pre>
  
  <p>What should I do?</p>