Which views perform a disk discovery every time they are queried?

Following views perform disk discovery every time they are queried:

• V$ASM_DISKGROUP:

  In an ASM instance V$ASM_DISKGROUP describes a disk group (number, name, size related info, state, and redundancy type).

  In a DB instance V$ASM_DISKGROUP contains one row for every ASM disk group mounted by the local ASM instance.

• V$ASM_DISK:

  In an ASM instance V$ASM_DISK contains one row for every disk discovered by the ASM instance, including disks that are not part of any disk group.

  In a DB instance V$ASM_DISK contains rows only for disks in the disk groups in use by that DB instance.

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