Why would he crank up anything? Is there a problem? DBCHR is low according to Joan Rivers, so what? Instead of worrying about DBCHR, you should give a call to GEICO. It will have the same effect on your database, and it will save you some money on car insurance. -- Mladen Gogala Ext. 121 -----Original Message----- From: Michael McMullen [mailto:ganstadba@xxxxxxxxxxx] Sent: Wednesday, September 14, 2005 8:39 AM To: chiragdba@xxxxxxxxx Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Buffer cache hit very low...!!! 40 Gb database with a 250Mb SGA. What is your db_cache_size? What are you running on? I would crank that db_cache_size somewhere close to 2Gb and then never worry about it again.