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Hidden Oracle8i log 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
----------------------------------------- ----------------------------------------------------------------
_log_archive_buffer_size                  Size of each archival buffer in log file blocks
_log_archive_buffers                      Number of buffers to allocate for archiving
_log_archive_callout                      archival callout
_log_archive_delta_sync_wait              iterative sleep time in centiseconds seconds when SYNC=PARALLEL
_log_archive_net_timeout                  maximum network wait time in seconds when SYNC=PARALLEL
_log_blocks_during_backup                 log block images when changed during backup
_log_buffers_corrupt                      corrupt redo buffers before write
_log_buffers_debug                        debug redo buffers (slows things down)
_log_checkpoint_recovery_check            # redo blocks to verify after checkpoint
_log_committime_block_cleanout            Log commit-time block cleanout
_log_debug_multi_instance                 debug redo multi instance code
_log_io_size                              automatically initiate log write if this many redo blocks in buf
_log_simultaneous_copies                  number of simultaneous copies into redo buffer(# of copy latches
_log_space_errors                         should we report space errors to alert log
_log_switch_timeout                       Maximum number of seconds redos in the current log could span
_low_server_threshold                     low server thresholds



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