| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Creation_rate
|
Indicates the
rate at which the connections are created in the pool. |
Conns/Sec
|
A sudden increase in the value of this measure directly relates to an
increase in the database activity happening in this application.
|
| Destroy_rate
|
Indicates the
rate at which the connections are released from the pool. |
Conns/Sec
|
A decrease in the value of this measure points to an unusual
performance of the application. The application might not be releasing
the connections.
|
| Return_rate
|
This measure
indicates the rate at which the connections are being returned to the
pool. |
Conns/Sec
|
A low value of this measure might be due to some applications that are
not releasing the connections to the pool.
|
| Allocate_rate
|
Indicates the
rate at which the connections are allocated from the pool. |
Conns/Sec
|
A high value for this measure indicates more activity happening on the
server. An unusually high value for this measure might result in the
pool running out of connections, if the Return_rate is not concurrent.
|
| Pool_size
|
Indicates the
number of connections in the pool. It indicates the active pool size. |
Number
|
A growing pool size may be due to some of the applications not
releasing connections to the pool.
|
| Concurrent_waiters
|
Indicates the
average number of threads waiting for a connection. |
Number
|
A high value indicates a bottleneck on the application server. This
may be caused due to unreleased connections.
|
| Avg_wait_time
|
Indicates the
average time that a client waited to be granted a connection. |
Secs
|
An increase in this measure reflects a server bottleneck.
|
| Fault_rate
|
Indicates the
rate at which connection pool timeouts occur. |
Faults/Sec
|
A high value is indicative of a bottleneck on the server.
|
| Pct_used
|
Indicates the
average percentage of connections of the pool in use. |
Percent
|
This measure should not reach the maximum of 100 for optimal
performance of the application server. To reduce this value, try
increasing the pool size.
|
| Pct_maxed
|
Average
percentage of the time that all connections are in use. |
Percent
|
A high value indicates that the pool size needs to be increased for
effective operation of this application.
|
| Pstmt_cache_discard_rate
|
Indicates the
rate at which the prepared statements are discarded from the cache. |
Stmts/Sec
|
A high rate indicates a bottleneck in the application. It is a sign
of inefficient performance of the application.
|