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Sun ZFS Storage 7000 System Administration Guide |
Data Movement NDMP bytes transferred tofrom disk
Data Movement: NDMP bytes transferred to/from disk
Data Movement NDMP bytes transferred tofrom tape
Data Movement: NDMP bytes transferred to/from tape
Data Movement Shadow migration bytes
Data Movement: Shadow migration bytes
Data Movement Shadow migration ops
Data Movement: Shadow migration ops
Data Movement Shadow migration requests
Data Movement: Shadow migration requests
Protocol Fibre Channel operations
Protocol: Fibre Channel operations
Protocol: HTTP/WebDAV requests
Data Movement NDMP file system operations
Data Movement: NDMP file system operations
Disk ZFS logical IO operations
Disk: ZFS logical I/O operations
Memory Kernel memory lost to fragmentation
Memory: Kernel memory lost to fragmentation
This statistic counts the number of spin cycles on kernel locks, which consume CPU.
An understanding of operating system internals is required to properly interpret this statistic.
When investigating CPU load, after checking CPU: Percent utilization and CPU: CPUs broken down by percent utilization.
Some degree of kernel spins is normal for processing any workload, due to the nature of multi-threaded programming. Compare the behavior of kernel spins over time, and for different workloads, to develop an expectation for what is normal.
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