Red Hat NETWORK 3.6 - Información técnica descargar pdf (Pagina 174)

162 Appendix C. Probes

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 moni-

tored system to execute this probe. For this probe to run, the nocpulse user must be granted read

access to your log ﬁles.

Field Value

Oracle Hostname or IP address*

Oracle SID*

Oracle Username*

Oracle Password*

Oracle Port* 1521

ORACLE_HOME*

Expected DB Name*

Timeout* 30

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 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 mech-

anism).

• Cache Misses — The number of accesses made to the block buffer to retrieve data in a consistent

mode.

Field Value

Oracle SID*

Oracle Username*

Oracle Password*

Oracle Port* 1521

Timeout* 30

Warning Minimum Data Dictionary Hit Ratio

Critical Minimum Data Dictionary Hit Ratio

Table C-53. Oracle::Data Dictionary Cache settings

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Red Hat NETWORK 3.6 - Información técnica Pagina 174