| Name |
Description |
Version |
Granularity |
Type |
Level |
| createdSessions |
Number of sessions created |
3.5.5 and above |
per web application |
CountStatistic |
Low |
| invalidatedSessions |
Number of sessions invalidated |
3.5.5 and above |
per web application |
CountStatistic |
Low |
| sessionLifeTime |
The average session lifetime |
3.5.5 and above |
per web application |
TimeStatistic |
Medium |
| activeSessions |
The number of concurrently active sessions. A session is active
if WebSphere is currently processing a request which uses that session. |
3.5.5 and above |
per web application |
RangeStatistic |
High |
| liveSession |
The number of sessions that are currently cached in memory |
5.0 and above |
per web application |
RangeStatistic |
High |
| NoRoomForNewSession |
Applies only to session in memory with AllowOverflow=false. The number
of times that a request for a new session can not be handled because it would
exceed the maximum session count. |
5.0 |
per Web application |
CountStatistic |
Low |
| cacheDiscards |
Number of session objects that have been forced out of the cache.
(An LRU algorithm removes old entries to make room for new sessions and cache
misses). Applicable only for persistent sessions. |
5.0 |
per Web application |
CountStatistic |
Low |
| externalReadTime |
Time (milliseconds) taken in reading the session data from persistent
store. For multirow sessions, the metrics are for the attribute; for single
row sessions, the metrics are for the whole session. Applicable only for persistent
sessions. When using a JMS persistent store, the user has the choice of whether
to serialize the data being replicated. If they choose not to serialize the
data, the counter will not be available. |
5.0 |
per Web application |
TimeStatistic |
Medium |
| externalReadSize |
Size of session data read from persistent store. Applicable only
for (serialized) persistent sessions; similar to externalReadTime above. |
5.0 |
per Web application |
TimeStatistic |
Medium |
| externalWriteTime |
Time (milliseconds) taken to write the session data from the persistent
store. Applicable only for (serialized) persistent sessions. Similar to externalReadTime
above. |
5.0 |
per Web application |
TimeStatistic |
Medium |
| externalWriteSize |
Size of session data written to persistent store. Applicable only
for (serialized) persistent sessions. Similar to externalReadTime above. |
5.0 |
per Web application |
TimeStatistic |
Medium |
| affinityBreaks |
The number of requests received for sessions that were last accessed
from another Web application. This can indicate failover processing or a
corrupt plug-in configuration. |
5.0 |
per Web application |
CountStatistic |
Low |
| serializableSessObjSize |
The size in bytes of (the serializable attributes of ) in-memory
sessions. Only count session objects that contain at least one serializable
attribute object. Note that a session may contain some attributes that are
serializable and some that are not. The size in bytes is at a session level. |
5.0 |
per Web application |
TimeStatistic |
Max |
| timeSinceLastActivated |
The time difference in milliseconds between previous and current
access time stamps. Does not include session time out. |
5.0 |
per Web application |
TimeStatistic |
Medium |
| invalidatedViaTimeout |
The number of requests for a session that no CountStatistic exists,
presumeably because the session timed out. |
5.0 |
per Web application |
CountStatistic |
Low |
| attemptToActivateNotExistentSession |
Number of requests for a session that no longer exists, presumeably
because the session timed out. Use this counter to help determine if the timeout
is too short. |
5.0 |
per Web application |
CountStatistic |
Low |