| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Resize_quantity
|
The
quantity by which the cache size is reduced when the number of beans
in the cache equals the maximum cache size (that is, when cache
overflow occurs) |
Number
|
This is a configuration parameter for the EJB cache. This measure will not be available for Sun Java Application server 8.2 and above. |
| Cache_misses |
The
number of times a user request did not find a bean in the cache |
Number
|
Ideally, the percentage of cache misses to cache hits should be a low percentage.
|
| Idle_timeout |
The
rate at which the cache cleaner thread is scheduled. This cleaner
thread examines all beans in the cache and passivates those beans that
are not accessed for cache-idle-timeout-in-seconds. |
Secs
|
This is a configuration parameter for the EJB cache. This measure will not be available for Sun Java Application server 8.2 and above.
|
| Total_passivations |
Indicates
the total number of passivations. This applies only to stateful
session beans |
Number
|
|
| Cache_hits |
The
number of times a user request found an entry in the cache |
Number
|
|
| Passivation_errors |
Indicates
the number of errors that occurred during passivation. This applies
only to stateful session beans |
Number
|
|
| Beans_in_cache |
Indicates
the number of beans in the cache. This is the current size of the
cache |
Number
|
The ratio of beans in cache to the maximum beans in cache is an indicator of the cache occupancy. For maximum performance, the cache occupancy and hit rate must be high. |
| Expired_sessions |
Indicates
the number of expired sessions removed by the cleanup thread. This
applies only to stateful session beans |
Number
|
|
| Max_beans_in_cache |
This
is the maximum number of beans held in the cache, beyond which cache
overflow occurs. |
Number
|
This is a configuration parameter for the EJB cache. |
| Passivation_success |
Indicates
the number of times passivation completed successfully. This applies
only to stateful session beans. |
Number
|
|