单选题
From the V$SESSION_LONGOPS view， you find that some of the database users have long/x7frunning queries and are consuming a lot of CPU time. This causes problems for you when you try to log on as the system user and perform small maintenance tasks. You would like to ensure that users SYS and SYSTEM get priority over all other users. Which method would you use to achieve this objective？（）
发布日期：2020-04-10
create a plan directive in the SYS_GROUP
create the pending area for the consumer group
activate the provided SYSTEM_PLAN in Resource Manager
set the TIMED_STATISTICS parameter to TRUE in the parameter file
set the execution time limit for all users， except SYS and SYSTEM， in their profiles
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