title: Parallel processing input/output, queries, and indexes AS400
body: <p>IBM V6.1</p>
  
  <p>When using the I system navigator and when you click System values the following display.</p>
  
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  <p>By default the <code>Do not allow parallel processing</code> is selected.</p>
  
  <p>What will the impact be on processing in programs when you choose multiple processes, we have allot of rpgiv programs and sql queries being executed and  I think it will increase performance? </p>
  
  <p>Basically I want to turn this on in production environment but not sure if I will break anything by doing this for example input or output of different programs running parallel or data getting out of sequence?  </p>
  
  <p>I did do some research :</p>
  
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  <p>And understand each option but I do not know the risk of changing it from default to multiple.</p>