Which system view can be used to obtain the real-time active session list and analyze the activity information of active users in the current system?
SESSION_STAT
SESSION_TIME
SESSION_STAT_ACTIVITY
SESSION_MEMORY_DETAIL
Which of the following situations are suitable for generating a WDR?
A node restarted between two snapshots.
No major system failures or significant changes
A primary/standby switchover was performed between two snapshots.
The dbe_perf.statement view was reset.
Adding a hint to a SQL statement can instruct the SQL optimizer to select a specific execution plan. So, hints are recommended.
True
False
Which of the following is not the basic elements of an execution plan?
Scan mode
Join order
Join mode
Scan time
GaussDB supports cluster-level physical backups based on storage media and cluster-level restoration for homogeneous databases.
True
False