Curiously enough I had to stop the collection of Type19 records in the past couple of weeks due to this problem with VTOC enqueues. As has been stated, up to z/os 1.6 it is also necessary to turn off the Type69 records (no brainer for us as we don't create any), but this requirement is removed as of z/os 1.6 and turning off Type19 only is sufficient on 1.6 or above. For us, the problem occurred during an automatic I SMF (as the Lspace also occurs as a result of an "I SMF", not just at IPL time). It was only whilst investigating this issue I became aware that IPLs were being delayed due to VTOC enqueues (because I was specifically looking for them). I still don't understand the suggestion to turn off Type19 as an acceptable solution to be honest - it doesn't help if folks actually want to collect them does it? Fortunately we don't. I guess it is something that worked in the old days of single unconnected MVS images and never got updated.
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