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Oracle® ZFS Storage Appliance Analytics Guide, Release OS8.7.x

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Updated: August 2017

Disk: ZFS DMU Operations

This statistic shows ZFS DMU (Data Management Unit) operations/sec.

An understanding of ZFS internals is required to properly interpret this statistic.

When to Check ZFS DMU Operations

Troubleshooting performance issues, after all relevant standard Analytics have been examined.

The DMU object type breakdown can identify if there is excessive DDT (Data Deduplication Table) activity. For more information about data deduplication, see About Oracle ZFS Storage Appliance in Oracle ZFS Storage Appliance Administration Guide, Release OS8.7.x.

ZFS DMU Operations Breakdowns

Table 67  Breakdowns of ZFS DMU Operations
type of operation
DMU object level
DMU object type
ZFS plain file/ZFS directory/DMU dnode/SPA space map/...