218IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
Monitoring volume group I/O using lmstat
Once a volume group is enabled for lvmstat monitoring, like rootvg in this example, you
would only need to run lvmstat -v rootvg to monitor all activity to rootvg. An example of the
lvmstat output is shown in Example 7-19.
Example 7-19 lvmstat example
#lvmstat -v rootvg
Logical Volume iocnt Kb_read Kb_wrtn Kbps
lv05 682478 16 8579672 16.08
loglv00 0 0 0 0.00
datalv 0 0 0 0.00
lv07 0 0 0 0.00
lv06 0 0 0 0.00
lv04 0 0 0 0.00
lv03 0 0 0 0.00
Notice that lv05 is busy performing writes.
The lvmstat tool has powerful options such as reporting on a specific ...
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