db2 monitoring

db2 "update monitor switches using lock ON sort ON bufferpool ON uow ON table ON statement ON"
db2 "get snapshot for tablespaces|tables| on db db_name"

and to see which switches are active:
use
db2 "get dbm monitor switches"

Note:don't use double quotes while running the command from CLP

the following links provide good explanation for monitoring database:

http://space.itpub.net/?uid-47598-action-viewspace-itemid-330882

http://www.performancewiki.com/db2-event-monitors.html

http://it.toolbox.com/blogs/db2luw/using-the-snapshot-monitor-and-monitoring-via-sql-5631