We are hitting this error on one of our customers' production database. ORA-00379: no free buffers available in buffer pool DEFAULT for block size 8K. Need resolution asap, please help. I have set db_block_buffers=1300 going by the formula, db_block_buffers= (> 4*processes). Here, Processes = 300 and db_block_size=8192. I am not sure if that fixes it, got to wait and see. Last friday, I had to recreate init.ora file and spfile and restart the db since the customer support person accidentally edited the spfile and the db had failed to restart! After that everything was fine until we ran into this problem. Wondering if there is anything else I should take care of? Any ideas?