* Increase the instance parameter, processes. Be careful, as this parameter affects many other instance parameters.

* Increase the number of IMU pools by increasing the _im_pools parameter or increase the shared pool size by increasing the shared_pool_size parameter. These changes only encourage Oracle to create additional latches, so you may want to do some testing by running a script similar to that shown in Figure 7-18.

* Influence IMU memory. You can influence an IMU memory increase by increasing the shared pool size or by shifting other objects out of the shared pool. For example, you could set cursor_space_for_time to false and reduce the number of kept shared pool objects. Be careful! Increasing memory could also increase IMU activity, generating even more stress on the latches. Decreasing memory may decrease latch activity, but it is also likely to increase IMU node-collapsing activity, resulting in more traditional undo block activity, which can also result in increased IO. So before you start attempting to influence IMU memory, give it some serious thought, talk with your colleagues, and do some testing.