172 DB2 UDB V8 and WebSphere V5 Performance Tuning and Operations Guide
order to collect performance data. In a Network Deployment environment, the
client can choose to connect to the Deployment Manager first to retrieve a list of
nodes, servers and MBeans in the cell. Performance data retrieval is
subsequently performed in the same way for the two environments.
6.1.1 Performance data organization
Performance Monitoring Infrastructure (PMI) provides server-side monitoring and
a client-side API to retrieve performance data. PMI maintains statistical data
within the entire WebSphere Application Server domain, including multiple nodes
and servers. Each node can contain one or more WebSphere Application
Servers. Each server organizes PMI data