We tested Oracle on z/VM at my former customer's site; this must have been version 5.x - the time frame in the end 199x years.
We had to drop it, because performance was so bad. The problem was that the different Oracle processes that make up the Oracle database were implemented as different VM machines which commuicated via IUCV. If the load on the VM system was heavy, the commuication between the Oracle processes took much to long. In constrast, SQL/DS (or DB2/VM, as it was called later) is implemented in one VM machine, and the communication is done inside this machine. It did not suffer from similar problems; it was even able to support the VSE guests (using Guest Sharing) in an acceptable response time. We stopped all the "Oracle on VM" activities and changed the Oracle licences fees (which was about 250000 Deutsche Mark, IIRC) to Oracle licences for AIX and RS/6000s. Kind regards Bernd Am 14.02.2017 um 16:35 schrieb Paul Flint:
Dear David, Thanks. You Sine-Nomine-Associates are clearly wise folks with a whole lot of experience... Am I dreaming to assume that Oracle would actually support 7 on a current zVM? Regards, Flint
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