Planning: MD3200i Series Storage Array Terms and Concepts 59
The Performance Monitor data provides information about how your storage
array is performing. The data is presented in eight columns, which are
described in this table. Use this data to make performance tuning decisions
for your storage array.
For more information, see the online help topics.
Table 4-3. Performance Monitor Table Description
Column Headings Description
Devices Controller, virtual disk or storage array total.
Total IOs Cumulative IO’s per second from last start time.
Read Percentage Percentage of cumulative IO’s that are READs.
Cache Hit Percentage Percentage of cumulative IO’s that are in-cache.
Current KB/second Snapshot of throughput value per second (1KB
= 1024 bytes).
Maximum KB/second Maximum recorded throughput value from last
start time.
Current IO/second Snapshot of IO’s per second (IOP =
Input/output per second or one completed I/O
transaction).
Maximum IO/second Maximum recorded IOP from last start time.
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