Monitoring Database Activity from the Directory Server Console
387
Performance Metric
Current Total
appropriate database page. Thus, as this ratio
drops towards zero, the number of disk accesses
increases, and directory performance drops.
To improve this ratio, increase the amount of
data that the directory maintains in the database
cache by increasing the value of the
Maximum
Cache Size
setting. See
Section 15.2, “Tuning
Database Performance”
for information on
changing this value using the Directory Server
Console.
Pages Read In
The number of pages read from disk into the
database cache.
Pages Written Out
The number of pages written from the cache
back to disk. A database page is written to disk
whenever a read-write page has been modified
and then subsequently deleted from the cache.
Pages are deleted from the database cache
when the cache is full and a directory operation
requires a database page that is not currently
stored in cache.
Read-Only Page Evicts
The number of read-only pages discarded from
the cache to make room for new pages.
Read-Write Page Evicts
The number of read-write pages discarded from
the cache to make room for new pages. This
value differs from
Pages Written Out
in that
these are discarded read-write pages that have
not been modified.
Table 13.9. Database Cache Information
Performance Metric
Current Total
Cache Hits
The number of times that a search result resulted
in a cache hit on this specific file. That is, a client
performs a search that requires data from this
file, and the directory obtains the required data
from the cache.
Cache Misses
The number of times that a search result failed
to hit the cache on this specific file. That is,
a search that required data from this file was
performed, and the required data could not be
found in the cache.
Pages Read In
The number of pages brought to the cache from
this file.
Pages Written Out
The number of pages for this file written from
cache to disk.
Table 13.10. Database File-Specific
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