Just looking for a suggestion: We are interested in knowing how frequently does the large industries apply the Oracle Critical patch updates in their environments. We are currently looking into applying these in our DB environment. We have over 200 critial Oracle databases ranging from 18.104.22.168 to 10.2.0.2. Oralce Corporation releases the critical patches quarterly and it seems like it is not feasible in terms of time and resources to apply the patches quarterly to keep up with them. Could you please let me know what are the best general practices in applying these?