DB2 Version 9.7 for Linux, UNIX, and Windows

pool_watermark - Memory Pool Watermark monitor element

The largest size of a memory pool since its creation. The value is given in bytes.

Table 2. Event Monitoring Information
Event Type	Logical Data Grouping	Monitor Switch
Database	event_dbmemuse	-
Connection	event_connmemuse	-

Usage: On continuously running systems, you can use the pool_watermark and pool_config_size elements together to predict potential memory problems.
For example, take a snapshot at regular intervals (for instance, daily), and examine the pool_watermark and pool_config_size values. If you observe that the value of pool_watermark is becoming increasingly close to pool_config_size (a premature indication of potential future memory-related problems), this may indicate that you should increase the size of the memory pool.