pmon & smon transaction recovery/rollback

Hi

I have a basic question, we all know that pmon's task is to cleanup resource
by failed processes such as rolling back transaction, releasing locks and
resources etc. We also know that smon rolls back uncommited transactions
after instance failure.

My question is, I killed a couple of processes this morning and smon went
crazy performing parallel recovery, I was wondering shouldnt that pmon's
job? There was no instance failure.

TIA

Alex

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