Oracle::library Cache; Oracle::locks - Red Hat NETWORK 4.0.5 Reference Manual

Appendix C. Probes
C.9.10. Oracle::Library Cache
The Oracle::Library Cache probe computes the Library Cache Miss Ratio so as to optimize
the SHARED_POOL_SIZE in
Library Cache Miss Ratio — The rate at which a library cache pin miss occurs. This
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happens when a session executes a statement that it has already parsed but finds that the
statement is no longer in the shared pool.
Executions — The number of times a pin was requested for objects of this namespace.
•
Cache Misses — The number of pins of objects with previous pins since the object
•
handle was created that must now retrieve the object from disk.
Field
Oracle SID*
Oracle Username*
Oracle Password*
Oracle Port*
Timeout*
Critical Maximum Library Cache Miss Ratio
Warning Maximum Library Cache Miss Ratio
Table C-57. Oracle::Library Cache settings
C.9.11. Oracle::Locks
The Oracle::Locks probe monitors an Oracle database instance and collects the following
metric:
Active Locks — The current number of active locks as determined by the value in the
•
v$locks table. Database administrators should be aware of high numbers of locks present
in a database instance.
Locks are used so that multiple users or processes updating the same data in the database do
not conflict. This probe is useful for alerting database administrators when a high number
of locks are present in a given instance.
Field
. It collects the following metrics:
init.ora
Value
1521
30
Value
247