362 HA Architectures & Capacity Planning with WebSphere Remote Server V6
When the percentage of space occupied by changed pages in the buffer pool
exceeds the value specified by the CHNGPGS_THRESH configuration
parameter, page-cleaner agents begin to write clean buffer pages to disk.
Page-cleaner agents
Page-cleaner agents perform I/O as background processes and allow
applications to run faster because their agents can perform transaction work.
Page-cleaner agents are sometimes referred to as
asynchronous page cleaners
or
asynchronous buffer writers because they are not coordinated with the work of
other agents and work only when required.
To improve performance in update-intensive workloads, configure more
page-cleaner agents. Performance improv ...