title: TKProf Output: SQL*Net message from client
body: <p>I am currently in the process of debugging a database performance issue. I have run extended trace on the suffering oracle box to obtain a trace file which I have analyzed using tkprof.</p>
  
  <p>One thing that caught my eye straight away was the following output;</p>
  
  <pre><code>  Elapsed times include waiting on following events:
    Event waited on                             Times   Max. Wait  Total Waited
    ----------------------------------------   Waited  ----------  ------------
    SQL*Net message to client                       4        0.00          0.00
    SQL*Net message from client                     4      109.06        141.31
  </code></pre>
  
  <p>I have run the relate query manually via a SQL client an it executes in a timely fashion. So I don't think its cause directly by the query.</p>
  
  <p>Can some one clarify what exactly "SQL*Net message from client" means ?</p>
  
  <p>Does anyone have any idea what could be causing such large wait times ?</p>
  
  <p>Thanks in advance </p>
  
  <p>Karl</p>