HP-UX Directory Server Administrator Guide HP-UX Directory Server Version 8.1 (5900-3098, May 2013)

Table 68 Summary information (continued)
Current totalPerformance metric
Maximum Entries in Cache attribute. See “Tuning database performance” (page
539) for information on changing this value using the Directory Server Console.
The total size of directory entries currently present in the entry cache.Current Entry Cache Size (in Bytes)
The size of the entry cache maintained by the directory. This value is managed
by the Maximum Cache Size setting. See “Tuning database performance” (page
539) for information on changing this value using the Directory Server Console.
Maximum Entry Cache Size (in Bytes)
The total number of directory entries currently present in the entry cache.Current Entry Cache Size (in Entries)
The maximum number of directory entries that can be maintained in the entry
cache. This value is managed by the Maximum Entries in Cache setting. See
Maximum Entry Cache Size (in Entries)
“Tuning database performance” (page 539) for information on changing this
value using the Directory Server Console.
There are many different databases listed for the database monitoring page, by default, because
databases are maintained for both entries and indexed attributes. All databases, though, have the
same kind of cache information monitored in the counters.
Table 69 Database cache information
Current totalPerformance metric
The number of times the database cache successfully supplied a requested
page. A page is a buffer of the size 2K.
Hits
The number of times the database cache was asked for a page.Tries
The ratio of database cache hits to database cache tries. The closer this value
is to 100%, the better. Whenever a directory operation attempts to find a
Hit Ratio
portion of the database that is not present in the database cache, the directory
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 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 “Tuning database performance” (page 539) for information on
changing this value using the Directory Server Console.
The number of pages read from disk into the database cache.Pages Read In
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, then subsequently
Pages Written Out
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.
The number of read-only pages discarded from the cache to make room for
new pages.
Read-Only 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.
Read-Write Page Evicts
526 Monitoring Server and Database Activity