Just did it over the weekend for DW on 11.2.0.2 SET SERVEROUTPUT ON DECLARE lat INTEGER; iops INTEGER; mbps INTEGER; BEGIN -- DBMS_RESOURCE_MANAGER.CALIBRATE_IO (<DISKS>, <MAX_LATENCY>, iops, mbps, lat); DBMS_RESOURCE_MANAGER.CALIBRATE_IO (256, 11, iops, mbps, lat); DBMS_OUTPUT.PUT_LINE ('max_iops = ' || iops); DBMS_OUTPUT.PUT_LINE ('latency = ' || lat); DBMS_OUTPUT.PUT_LINE ('max_mbps = ' || mbps); end; / Michael Dinh Disparity Breaks Automation (DBA) Confidence comes not from always being right but from not fearing to be wrong - Peter T Mcintyre Great minds discuss ideas; average minds discuss events; small minds discuss people - Eleanor Roosevelt When any rule or formula becomes a substitute for thought rather than an aid to thinking, it is dangerous and should be discarded -Thomas William Phelps -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Niall Litchfield Sent: Thursday, June 07, 2012 11:03 PM To: ORACLE-L Subject: I/O performance I'm curious how many of you measure I/O performance ( IOPS, service times and MB/s ) regularly on your databases? And for those in SAN environments if you have access to ballpark figures for what you should be getting. -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l