C.9.5. Oracle::client Connectivity; C.9.6. Oracle::data Dictionary Cache - Red Hat NETWORK SATELLITE 5.1.1 Reference Manual

Appendix C. Probes
Field
Oracle SID*
Oracle Username*
Oracle Password*
Oracle Port
Timeout*
Warning Minimum Buffer Cache Hit Ratio
Critical Minimum Buffer Cache Hit Ratio
Table C.51. Oracle::Buffer Cache settings

C.9.5. Oracle::Client Connectivity

The Oracle::Client Connectivity probe determines if the database is up and capable of receiving
connections from the monitored system. This probe opens an rhnmd connection to the system and
issues a sqlplus connect command on the monitored system.
The Expected DB name parameter is the expected value of V$DATABASE.NAME. This value is case-
insensitive. A CRITICAL status is returned if this value is not found.
Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the
monitored system to execute this probe. For this probe to run, the nocpulse user must be granted
read access to your log files.
Field
Oracle Hostname or IP address*
Oracle SID*
Oracle Username*
Oracle Password*
Oracle Port*
ORACLE_HOME*
Expected DB Name*
Timeout*
Table C.52. Oracle::Client Connectivity settings

C.9.6. Oracle::Data Dictionary Cache

The Oracle::Data Dictionary Cache probe computes the Data Dictionary Cache Hit Ratio so as to
optimize the SHARED_POOL_SIZE in init.ora. It collects the following metrics:
• Data Dictionary Hit Ratio — The ratio of cache hits to cache lookup attempts in the data dictionary
cache. In other words, the rate at which the database goes to the dictionary instead of the hard disk
to retrieve data. A low ratio suggests more RAM should be added to the system.
• Gets — The number of blocks accessed via single block gets (not through the consistent get
mechanism).
• Cache Misses — The number of accesses made to the block buffer to retrieve data in a consistent
mode.
232
Value
1521
30
Value
1521
/opt/oracle
30