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Diving
Into the Shared Pool - An In Depth Look at Tuning the Shared Pool (Part 2)
Oracle Tips by Mike Ault |
In Summary
Guideline 5: In Oracle7 when using MTS increase
the shared pool size to accommodate MTS messaging and queuing as
well as UGA requirements. In Oracle8 use the Large Pool to prevent
MTS from effecting the shared pool areas.
Guideline 6: Use bind variables, PL/SQL
(procedures or functions) and views to reduce the size of large SQL
statements to prevent hashing problems.
Guideline 7: In a system where there is no
flushing increase the shared pool size in 20% increments to reduce
reloads and invalidations and increase object cache hit ratios.
Guideline 8: In any shared pool, if the overall
data dictionary cache miss ratio exceeds 1 percent, increase the
size of the shared pool.
Using these
guidelines and the scripts and techniques covered in this two part
article, your should be well on the way towards a well tuned and
well performing shared pools.
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