Database Buffer Cache Hit Ratio

Hi people.

I had an 8.1.7.4 database with a 68% of buffer hit ratio and 180 Mb of cache, I've changed the db_block_buffers parameter so we have 234 Mb of db buffer cache, and the hit ratio is now 57%, almost a 10% less!!. I'm mad about this, i've been looking around and i think it could be a I/O retention in the only one DBWR process, żis this possible?

Are there any other factors to consider?

Thank you so much...

Regards Received on Wed Oct 05 2005 - 10:29:53 CDT