162 Appendix C. Probesinsensitive. A CRITICAL status is returned if this value is not found.Requirements — The Red Hat Network Monitoring Daemon (rhnmd) must be running on the moni-tored system to execute this probe. For this probe to run, the nocpulse user must be granted readaccess to your log files.Field ValueOracle Hostname or IP address*Oracle SID*Oracle Username*Oracle Password*Oracle Port* 1521ORACLE_HOME*Expected DB Name*Timeout* 30Table C-52. Oracle::Client Connectivity settingsC.9.6. Oracle::Data Dictionary CacheThe Oracle::Data Dictionary Cache probe computes the Data Dictionary Cache Hit Ratio so as tooptimize 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 dictionarycache. In other words, the rate the database goes to the dictionary instead of the hard disk to retrievedata. 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 mech-anism).• Cache Misses — The number of accesses made to the block buffer to retrieve data in a consistentmode.Field ValueOracle SID*Oracle Username*Oracle Password*Oracle Port* 1521Timeout* 30Warning Minimum Data Dictionary Hit RatioCritical Minimum Data Dictionary Hit RatioTable C-53. Oracle::Data Dictionary Cache settings
