Oracle::buffer Cache; Oracle::client Connectivity - Red Hat NETWORK 3.7 Reference Manual

Appendix C. Probes
Field
Oracle SID*
Oracle Username*
Oracle Password*
Oracle Port*
Time Blocking (seconds)*
Timeout*
Critical Maximum Blocking Sessions
Warning Maximum Blocking Sessions
Table C-50. Oracle::Blocking Sessions settings
C.9.4. Oracle::Buffer Cache
The Oracle::Buffer Cache probe computes the Buffer Cache Hit Ratio so as to optimize the system
global area (SGA) Database Buffer Cache size. It collects the following metrics:
Db Block Gets — The number of blocks accessed via single block gets (not through the consistent
•
get mechanism).
Consistent Gets — The number of accesses made to the block buffer to retrieve data in a consistent
•
mode.
Physical Reads — The cumulative number of blocks read from disk.
•
Buffer Cache Hit Ratio — The rate the database goes to the buffer instead of the hard disk to retrieve
•
data. A low ratio suggests more RAM should be added to the system.
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 con-
nections from the monitored system. This probe opens an
a
sqlplus connect
The Expected DB name parameter is the expected value of
command to be run on the same monitored system.
Value
1521
20
30
Value
1521
30
connection to the system and issues
rhnmd
V$DATABASE.NAME
171
. This value is case-