oracle rac 关闭drm 方式

需关闭所有实例，再重新启动db服务生效：

10g:

alter system set "_gc_affinity_time"=0 scope=spfile;

alter system set "_gc_undo_affinity"=false scope=spfile;

11g:

alter system set "_gc_policy_time"=0 scope=spfile sid='*';
alter system set "_gc_undo_affinity"=false scope=spfile sid='*';

12c/19c:

alter system set "_lm_drm_disable"=7 scope=both sid='*';