Sorry, I forgot to mention I'm using disk backup. Yes, we have EE. Sandy On Mon, Nov 12, 2012 at 1:52 PM, Martin Klier <usn@xxxxxxxxx> wrote: > Hi, > > two questions: > You opened multiple channels. Is it possible to write to them > concurrently? Often SBT media disallows that and breaks the parallelism. > Silly, but necessary: Do you have Enterprise Edition? > > Regards > Martin > > Sandra Becker schrieb: > > Oracle 11.2.0.2 > > SLES11 on IBM mainframe > > DB size - just below 1T > > I run an incremental 0 backup on my production OLTP once a week, > > incrementals the rest of the week. Recently changed the disk_asynch_io > to > > TRUE and the filesystemio_options to SETALL, per recommendations from > > Oracle. I then added a channel to the backup scripts so it uses 4 > > channels. These changes shaved 35 pecent off the time it takes to run > the > > incr0 backup, which I am very happy with. > > > > The SA monitoring the performance of the mainframe says the incremental 0 > > backup of our production OLTP is pegging a single CPU, out of 5 > available. > > He thinks the backup would run even faster if it used more CPUs and > > suggested setting the PARALLELISM parameter to more than 1. Unbeknownst > to > > him, it had been set to 3 for the past 6 years. He wants to know why the > > backup isn't using more CPUs. Any ideas/suggestions? > > > > -- > Usn's IT Blog for Linux, Oracle, Asterisk > http://www.usn-it.de > > -- Sandy Transzap, Inc. -- //www.freelists.org/webpage/oracle-l