Tuning cpu sensitive db

Question

Hi,Experts,
Could I use some benchmark parameter to tune the cpu sensitive db.(oracle 10.2.0.4 on solaris)
such as db_block_checksum, db_block_checking.
and if oracle will approve below parameters
collectundo_stats=false
dbcache_pre_warm=FALSE
undoautotune = false
checkblock_after_checksum = false
inmemory_undo=false
cursorcache_frame_bind_memory = true
lmfile_affinity=something
Thanks
Simon Lai

Answer 1

When you say 300 MHz, do you really mean a Sun T1000 or T2000 system with a Niagara T1 processor? At 1.2 GHz with 8 cores and 4 threads each core, this is effectively 32 * 300 MHz CPUs. In which case my strongest advice is buy another system and throw this one out. The Niagara processors are well known as being very bad for running real world Oracle database on - in spite of everything Sun may say about them.
For instance read this Pythian blog entry:
http://www.pythian.com/blogs/1499/sunfire-t2000-servers-are-best-suited-for-oracle-middletier
If you have a real 300 MHz CPU, my advice is pretty much the same. You could easily replace this system with a PC running Linux using an Intel Core2 Dual or Quad Core CPU at over 2 GHz for under $1,000 at my guess. And the Intel CPUs today will beat hands down a 300 MHz CPU.
Really, if the slow CPU is that much of a problem, then replace the hardware. Everything will run much faster as a result. The last time I came across a 300 MHz CPU was around 1998, which is over 11 years ago. Moore's Law says that CPUs double in performance every 1.5 years - so you have at least 10 times improvement in CPU speed since then! Why are you using such slow CPUs?
John