Hi

We have a database that had a Buffer Cache Hit Ratio of 24% average through the day.
The database has a block size of 8k
The DB_BLOCK_BUFFERS was set to 200

I changed this to 2000 and yet the buffer cache hit ratio has hardly improved. I have checked 'DBWR make free requests' from V$SYSSTAT and bfore the change this was 16000+ since the change it is now 0

Is this low hit ratio due to the fact that the DB may have few users connected. It is not a heavily used system

Cheers
Slaine