Quiescing nodes with slow drain
Slow drain for quiesce on a highly available system is not the default. The following actions occur on a Pega Platform server when the quiesce process is enabled.
- The default time-out for passivation is reduced, referred to as an accelerated passivation period.
- Users are placed in a passivation queue.
- The system stops non-essential agent processing for quiesce and all listeners, with the
exception of message-driven bean (MDB) listeners. System critical agents remain active during this step.
- When the active user requestor count drops to 0, the system sets the server state to "Quiesce Complete" and the Pega Platform server is ready for maintenance.
For a diagram that illustrates the on-premises quiesce flow for highly available systems when using slow drain, see On-premises slow drain quiesce flow.
- Quiescing a node with slow drain
The slow drain method requires removing the nodes from the load balancer before starting the quiesce process.