Background: z/VM 5.4 RSU0902 We have recently been having a TPF guest system fail. An analysis of the dump shows it is related (in some way) to an OSA timeout.
The exact cause is not clear, and there are a number of possible red herrings floating around. However, while I was looking at the VM setup I came across QIOAssist. It is ON for the system but INACTIVE for all users except the VM TCPIP stack. Reading the description, it looks as if it is a 'good thing' to have - particularly for a TPF system that is driving OSA's itself. My only hesitation in setting this ON for this user is - if it is generally a good thing and there is no downside, then why is not active for all users by default? This leads me to believe that there must be some trade-off (or cases where it could be a negative). Can anyone enlighten me what the downside, if any, of setting this active for one or more users might be. Thanks in advance Colin Allinson Amadeus Data Processing GmbH
