>From Helen's bible...

1.       MON$RECORD_BACKOUTS

Number of records where a new primary record version is
backed out due to a rollback or savepoint undo

2.       MON$RECORD_PURGES

Number of records where the record version chain is being
purged of versions no longer needed by OAT or younger transactions

3.       MON$RECORD_EXPUNGES

Number of records where record version chain is being deleted due
to deletions by transactions older than the OAT

Where OAT = Oldest Active Transaction.

Paul


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