Re: "Practicing" Oracle performance tuning ...

OEM 10g (Database Control) is definitely a solid performance tuning
product and if you've got use it. OEM is set up for 24x7 monitoring
and is good at it. DB Optimizer is a quick easy reliable view into
performance and is complimentary to OEM.

DB Optimizers advantages over OEM 10g
   faster
   lighter
   easier
   cheaper
   less resource usage
DB Optimizer works on Oracle 8 and 9 as well as 10 and 11.
DB Optimizer has no database install on a database - just point and monitor.
DB Optimizer's data is visualized faster than OEM and the data can be
analyzed finer grained than OEM.
DB Optimizer uses less than 1% of a CPU. Diagnostics pack sometimes
use 100% of a CPU over several minutes of time every hour.
DB Optimizer costs a fraction of the price of OEM ( often 1/100 the
price for a medium size shop).
DB Optimizer works on SQL Server, Sybase and DB2 which  might or might
not be very important.

I've personally been frustrated with OEM's slowness and more
importantly at OEM not being available for various hard to diagnose
reasons. On a small database I found it faster to recreate the
database than figure out why OEM broke, thus I like the light easy
dependable fast access to the performance data that DB Optimizer
gives.

Best
Kyle
--
http://www.freelists.org/webpage/oracle-l


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