| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Total_read_hit_reqs |
Indicates the rate at which requests to this LUN group were served by the cache. |
Reqs/Sec |
|
| Total_read_hit_data |
Indicates the rate at which this LUN group read data from the cache. |
MB/Sec |
|
| Avg_read_hit_latency |
Indicates the average time taken for reading from cache. |
Ms |
A high value could indicate an I/O bottleneck. |
| Total_read_miss_reqs |
Indicates the rate at which read requests to the LUN group were serviced by the disk and not the cache. |
Reqs/Sec |
Ideally, this rate should be low. A high rate indicates a large number of direct disk accesses, which in turn may expose the physical disk to overuse, and may increase the processing overheads.
|
| Total_read_miss_data |
Indicates the rate at which data was read from the physical disk and not the cache. |
MB/Sec |
| Avg_read_miss_latency |
Indicates the time taken by this test for reading from the physical disk. |
Ms |
|
| Total_write_reqs |
Indicates the rate at which write requests to the LUN group were serviced by the cache. |
Reqs/Sec |
|
| Total_write_data |
Indicates the rate at which data was written to the cache. |
MB/Sec |
|
| Avg_write_latency |
Indicates the time taken for writing to disk. |
Ms |
A high value could indicate an I/O bottleneck.
|