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Measures reported by NsDbCacheTest
This test reports measures the performance of the caching activity of the Netscape Directory server. The measures made by this test are as follows:
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Cache_hit_ratio |
The ratio of database cache hits to database cache tries
|
Percent
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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.
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| Pages_readin_rate |
The rate of pages read from disk into the database cache during the last measurement period
|
Pages/Sec
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| Pages_writtenout_rate |
The rate of pages for this file written from cache to disk during the last measurement period
|
Pages/Sec
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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.
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