lvmsar
was the LVM system activity reporter for displaying I/O statistics on logical
TLDR
Run the legacy reporter (LVM1 systems only)
$ lvmsar
Report I/O statistics for a device using device-mapper stats$ dmstats report [/dev/mapper/device]
List statistics regions for a device$ dmstats list [/dev/mapper/device]
SYNOPSIS
lvmsar
DESCRIPTION
lvmsar was the LVM system activity reporter for displaying I/O statistics on logical volumes. It processed data collected by lvmsadc and presented performance metrics for analysis.
This command is not supported under LVM2. Modern systems should use dmstats instead, which provides comprehensive device-mapper statistics including read/write operations, throughput, and latency histograms.
CAVEATS
Deprecated: This command only works on legacy LVM1 systems. For LVM2, use dmstats report to view I/O statistics on device-mapper devices.