Tim, When I have done ODBC load tests with stats_block_level enabled on (20 mins. per test), I've seen about 3-4% performance hit. Your mileage may vary. Steve Poe On Mon, 2006-03-13 at 18:49 -0500, mcelroy, tim wrote: > Good evening, > > Does anyone know how much of a performance hit turning > stats_block_level and stats_row_level on will incur? Do both need to > be on to gather cache related statistics? I know the > annotated_conf_80 document states to only turn them on for debug but > if they're not that performance intensive I cannot see the harm. > > Thank you, > Tim McElroy >