Values of 1000 to 10000 have worked well for me :) This was derived from trial and error. From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Denis Sent: Wednesday, April 20, 2011 6:38 PM To: oracle-l@xxxxxxxxxxxxx Subject: Determine sequence cache size in RAC Hi, listers, Is there a rule of thumb that relates sequence cache size to insert rate and number of instances? Anyone can share what the cache size is for your RAC's insert-intensive tables? Denis