01-16-2013
When is the job scheduled?
When you run interactively, that means you are in the office no? We are talking of day time... normally all sites have very few batch jobs running daytime in order to not interfere with offices work, ah but when comes evening there should be very few interactive sessions etc... and so it is a good time to launch all the batches, cloase the RDBMS and open them again, then perhaps do an export of the DB etc... and for the system guys its time to do some maintenance...
and most important thing running after hours?
Backups...
That said, how does a unix proize jobs running? well with time jobs that take time (too much...) loose priority as time passes it cant end in a silly situation where the job has so little priority it can almost never finish... ( this was true before Y2K, I cant recall of cases since...)
You have enough clues now to do some investigations!
Good luck
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