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Oracle hidden memory manager PGA advice parameters
Don Burleson


Note: Oracle hidden parameters are undocumented and unsupported by Oracle.
Make sure that you thoroughly test all hidden parameters before placing them in your production environment.

Parameter Name                            Description
----------------------------------------- ----------------------------------------------------------------
_smm_advice_enabled                       if TRUE, enable v$pga_advice
_smm_advice_log_size                      overwrites default size of the PGA advice workarea history log
_smm_auto_cost_enabled                    if TRUE, use the AUTO size policy cost functions
_smm_auto_max_io_size                     Maximum IO size (in KB) used by sort/hash-join in auto mode
_smm_auto_min_io_size                     Minimum IO size (in KB) used by sort/hash-join in auto mode
_smm_bound                                overwrites memory manager automatically computed bound
_smm_control                              provides controls on the memory manager
_smm_max_size                             maximum work area size in auto mode (serial)
_smm_min_size                             minimum work area size in auto mode
_smm_px_max_size                          maximum work area size in auto mode (global)
_smm_trace                                Turn on/off tracing for SQL memory manager



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