Idle, listed as Idle Threads in the Admin Console, indicates the number of threads that are currently idle. Peak indicates the peak number of threads in the pool. Limit, listed as Threads in the Admin Console, indicates the maximum number of native threads allowed in the thread pool, and for NativePool is determined by the setting of NativePoolMaxThreads in the magnus.conf file.
You can modify the maximum threads for NativePool by editing the NativePoolMaxThreads parameter in magnus.conf. For more information, see NativePoolMaxThreads Directive.