Hi!
I tried to write a brief monitoring script using V$SESSMETRIC. However,
the table is empty. It's Oracle 12.2 on Oracle Linux 7.6. Is there any
parameter needed to populate the table? Oracle documentation doesn't
provide any useful information:
https://docs.oracle.com/en/database/oracle/oracle-database/12.2/refrn/V-SESSMETRIC.html#GUID-FFC5A6B9-9FBE-477A-91A8-0675C345725C
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