Implementation Guide › Performance Tuning › Web Tier Performance › Improve Web Agent Performance through Load Balancing › Failover and Load Balancing with Multi-Process Web Servers

Failover and Load Balancing with Multi-Process Web Servers

A Web Agent running on a multi-process web server (such as an Apache-based server running in pre-fork mode) opens the same number of connections to all configured Policy Servers, regardless of whether failover has occurred or not.

When failover occurs, it happens independently for each child, because each child process has its own connections to the Policy Server. This results in a 500 error for each socket as failover takes place. After the primary Policy Server comes back up, the sockets opened to the failover server remain open. All new sockets are opened to the primary Policy Server.