[standalone@localhost:9990 /] cd subsystem=io/worker=default
[standalone@localhost:9990 worker=default] :read-resource-description(recursive=true)
{
    "outcome" => "success",
    "result" => {
        "description" => "Defines workers",
        " capabilities" => [{
            "name" => "org.wildfly.io.worker",
            "dynamic" => true
        }],
        "attributes" => {
            "io-threads" => {
                "type" => INT,
                "description" => "Number of IO threads to use",
                "expressions-allowed" => false,
                "nillable" => true,
                "access-type" => "read-write",
                "storage" => "configuration",
                "restart-required" => "no-services"
            },
            "stack-size" => {
                "type" => LONG,
                "description" => "stack-size",
                "expressions-allowed" => false,
                "nillable" => true,
                "default" => 0L,
                "access-type" => "read-write",
                "storage" => "configuration",
                "restart-required" => "no-services"
            },
            "task-keepalive" => {
                "type" => INT,
                "description" => "task-keepalive",
                "expressions-allowed" => false,
                "nillable" => true,
                "default" => 60,
                "access-type" => "read-write",
                "storage" => "configuration",
                "restart-required" => "no-services"
            },
            "task-max-threads" => {
                "type" => INT,
                "description" => "task-max-threads",
                "expressions-allowed" => false,
                "nillable" => true,
                "access-type" => "read-write",
                "storage" => "configuration",
                "restart-required" => "no-services"
            }
        },
        "operations" => undefined,
        "notifications" => undefined,
        "children" => {}
    }
}