Hi, George You forgot to say what version of Oracle is this. Did you check what waits are occuring on DR? This might help... -- Regards, Yavor Ivanov Senior Database Expert Stemo Ltd On Thu, 07 Dec 2006 15:00:46 +0200, George <george@xxxxxxxxxxxx> wrote: > Hi all. > > ok this is a difficult one. > > Production is a IBM p595 (Power 5) 32 cpu's > DR is a IBM 690 (Power 4) 32 cpu's > > the hardware configuration is exactly the same other than for the 595 to 690. > > both machines has 32 hba's (2 GB/ports) connecting to exactly the same lun > design, down to naming, number of spindles. spindle speeds etc, whats > located on the spindles, kernel parameters. > > at the moment production can product 4000 archive redo log files per day, > DR can only apply 3000. > > wierd thing is DR IO layers are all idling, this is the view from the > spindle performance, HBA's everything is idling, cpu's max usage is like > 25%. > > hwo can i dig deeper, how can i get DR to apply log files faster. > > oh each log file is 250mb. > > DR while applying log files say via nmon it is reading 10mb/sec. we have > shown we can do 10 times that easily. > > thanks. > > > ------------------------------------------------ > George > > george@xxxxxxxxxxxx > > You Have The Obligation to Inform One Honestly of the risk, And As a Person > You Are Committed to Educate Yourself to the Total Risk In Any Activity! > Once Informed & Totally Aware of the Risk, > Every Fool Has the Right to Kill or Injure Themselves as They See Fit! > > > > ------------------------------------------- > For super low premiums, click here http://www.webmail.co.za/dd.pwm > > -- > //www.freelists.org/webpage/oracle-l > -- //www.freelists.org/webpage/oracle-l