|
Measures reported by Disk Cache Hit Miss Test
This test monitors hit and miss rates occurring within the disk cache.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Hits |
Indicates the number of requests serviced by the disk cache during the last measurement period. |
Number |
A high value is desired for this measure. |
| Misses |
Indicates the number of requests that were not serviced by the disk cache during the last measurement period. |
Number |
A low value is desired for this measure. |
| Hit ratio |
Indicates the percentage of requests that were serviced by the disk cache. |
Percent |
A high ratio of hits is ideal. A very low ratio indicates that a majority of requests have been served by direct disk accesses only. This has an adverse impact on the overall health of the database server. |
|