Since version 7 Tomcat supports an attribute in server.xml <Host> to configure the number of threads for starting and stopping Contexts in parallel.
cargo.tomcat.host.startStopThreads can be configured to control this attribute. If not set the attribute won't be present in server.xml
This helps us improving the starting performance of the Cargo container.
Pull request https://github.com/codehaus-cargo/cargo/pull/108 is already prepared.