From "An Oracle 10g Upgrade Case Study: Looking at System Performance Before
and After the Upgrade," by Roger Schrag (February 2005)
(http://www.dbspecialists.com/presentations/case_study_10g.html):
"In addition to the shared pool having less usable space in Oracle 10g for
the same shared_pool_size setting, it also appears that individual SQL
statements occupy more space in Oracle 10g's shared SQL area than Oracle 8i's-in
our case almost twice as much."
Detailed stats are in the paper.
--Terry
Does anybody know what is the difference between the space needed for the same cursor (SQL) in 9i and 10g?
I have heard about some 2x difference between 8i and 10g. This will lead to "dramatic" shared_pool_size increase in 10g for havy loaded databases.
Anybody has some mathematics available.
I am very curious, because it looks that 10g is much more hungry for the cursor space in SQL Area piece of shared pool.
All parameters are the same (except maybe undocumented) in 9i and 10g and still it looks that the cursors in 10g eating much more space.
Regards, Zoran
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