| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Cache_hits |
Indicates the number of times the Directory server has successfully processed a search request to retrieve data from the database cache. |
Number |
|
| Cache_tries |
Indicates the number of times the Directory server has been looked in to retrieve data from the database cache. |
Number
|
|
|
| Cache_hit_ratio |
The ratio of database cache hits to database cache tries. |
Percent |
The closer this value is to 100%, the better. Whenever a directory operation attempts to find a portion of the database that is not resident in the database cache, the directory server has to perform a disk access to obtain the appropriate database page. Thus, as this ratio drops towards zero, the number of disk accesses increases and directory server performance drops. |
| Pages_readin_rate |
The rate at which the pages were read from disk to the database cache during the last measurement period. |
Pages/Sec |
|
| Pages_writtenout_rate |
The rate at which the pages for this file were written from cache to disk during the last measurement period. |
Pages/Sec |
A database page is written out to disk whenever a read-write page has been modified and then subsequently evicted from the cache. Pages are evicted from the database cache when the cache is full and a directory operation requires a database page that is not currently stored in cache. |