Best Practices and Recommendations for RAC databases with SGA size over 100GB(文档 ID 1619155.1)
a. Set _lm_sync_timeout to 1200
Setting this will prevent some timeouts during reconfiguration and DRM. It's a static parameter and rolling restart is supported.
b. Set _ksmg_granule_size to 134217728
Setting this will cut down the time needed to locate the resource for a data block. It's a static parameter and rolling restart is supported.
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