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Oracle Shared Pool Advisor in Oracle9i

Chapter 2 Inside the Oracle Shared Pool

Guideline 8

If the data dictionary cache ratio is greater than 1.0, increase the size of the shared pool.

Shared Pool Advisor in Oracle9i

Oracle9i also provides the v$shared_pool_advice DPT which like its other advisor views provides estimates as to the effects of increasing or decreasing the monitored parameter, in this case, shared_pool_size. A script to pull information form the v$shared_pool_advice view is shown below:

shared_pool_adv.sql

--**********************************************
--
--   Copyright © 2003 by Rampant TechPress Inc.
--
--   Free for non-commercial use.
--   For commercial licensing, e-mail rtp AT rampant.cc
--

ttitle 'Shared Pool Advice'
spool shared_pool_adv
select shared_pool_size_for_estimate est_size, shared_pool_size_factor
factor,
estd_lc_size, estd_lc_time_saved, estd_lc_memory_object_hits hits
from v$shared_pool_advice
/
spool off
ttitle off

An example output from this script is shown below.

Fri Oct 10                                           page    1

                     Shared Pool Advice

  EST_SIZE     FACTOR ESTD_LC_SIZE ESTD_LC_TIME_SAVED       HITS
---------- ---------- ------------ ------------------ ----------
        24         .5            1                 21        671
        32      .6667            1                 21        671
        40      .8333            1                 21        671
        48          1            1                 21        671
        56     1.1667            1                 21        671
        64     1.3333            1                 21        671
        72        1.5            1                 21        671
        80     1.6667            1                 21        671
        88     1.8333            1                 21        671
        96          2            1                 21        671

10 rows selected.

 



 

The Oracle script collection contains more than 600 working Oracle scripts.  You can download them immediately at this link:
 


 

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