Mark, Wrong answer. Correct answer: "Yeah, well, they're undocumented and the 9.2 rdbms engine complained = about them & would not start." One must disarm the manager before he creates chaos. Dick Goulet Senior Oracle DBA Oracle Certified 8i DBA -----Original Message----- From: Bobak, Mark [mailto:Mark.Bobak@xxxxxxxxxxxxxxx] Sent: Wednesday, September 15, 2004 4:45 PM To: oracle-l@xxxxxxxxxxxxx Subject: Argh..... We are suffering from a bunch of excess database calls, resulting in lots more executions of SQL and (ovbiously) more buffer gets for any given interval of time, and of course, cache buffers chains latch contention is the result. So, what's my boss's direction? Find the source of the extra calls and extra workload? No..... "Mark, when we moved to 9i, you removed _db_block_hash_latches and _db_block_hash_buckets right?" (This is my favorite part...) "I feel that is the problem....Please look into setting these parameters again...." ("I feel..." Grrr.....it just gets on my nerves...."I feel". How about, "Based on this data, I think this is what's happening"?? "I feel"?? Or "Here's the evidence which suggests this is the problem....") Ok, I'm going to go now and pretend that setting these parameters is going to have any significant effect on solving the problem. -- Mark J. Bobak Oracle DBA ProQuest Company Ann Arbor, MI "On two occasions, I have been asked [by members of Parliament], "Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage (1791-1871) -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l