If you are using Oracle 9, forget about O_I_C_A and O_I_C (i.e. leave them
at their default) and use dbms_stats.gather_system_stats
My 0.014938 cents (Canadian currency)
At 07:30 AM 3/5/2004, you wrote:
Oracle support(without knowing anything about my system) is telling me to use the following settings:
OPTIMIZER_INDEX_CACHING = 50 OPTIMIZER_INDEX_COST_ADJ = 5
Tom Kyte's book effective Oracle by Design recommends starting optimizer_index_caching at my cache/hit ratio and adjusting as needed.
Tim Gorman's paper 'Search for Intelligent Life in the Cost-Based Optimizer' states that OPTIMIZER_INDEX_COST_ADJ should be set between 10 and 50 for most OLTPs.
This is a hybrid system, but I only have the OLTP parts to stress test(the other parts are still in early phase development). Does anyone have any opinions on this?
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