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Initialization parameters for tuning a Peoplesoft app on Oracle 10g

We are starting to upgrade to Oracle 10g and support a PeopleSoft application on AIX5L. Which initialization parameters do you consider important for tuning purposes?

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Some important ones are the size of your log buffer, and the sizes of your various SGA components (shared pool, database buffer cache). With 10g, you can set SGA_MAX_SIZE and SGA_TARGET, and Oracle will allocate SGA_MAX_SIZE bytes of shared memory on startup, then divide SGA_TARGET bytes of shared memory among the SGA components dynamically based on need. Similarly, setting PGA_AGGREGATE_TARGET will allow Oracle to allocate PGA memory among user sessions.

SESSION_CACHED_CURSORS can help avoid even soft parses if the same SQL is run many times per session.

I also suggest that you use automatic undo management.

This was first published in January 2006

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