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
The L2ARC is the 2nd Level Adaptive Replacement Cache, and is an SSD based cache that is accessed before reading from the much slower pool disks. The L2ARC is currently intended for random read workloads. This statistic shows the read and write byte rates to the L2ARC cache devices, if cache devices are present.
This can be useful to check during warmup. The write bytes will show the rate of L2ARC warmup of time.
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Also see Cache: L2ARC accesses.