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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.


If you like Oracle tuning, you may enjoy the book Oracle Tuning: The Definitive Reference , with over 900 pages of BC's favorite tuning tips & scripts. 

You can buy it directly from the publisher and save 30%, and get instant access to the code depot of Oracle tuning scripts.
 


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