Bug 139483 IDEIdleHelper should be a system job
RC2 The IDEIdleHelper is not a system job so you periodically get a "Collecting garbage" job showing up in the ProgressView.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEIdleHelper.java
/**
	 * The default minimum time between garbage collections.
	 */
	private static final int DEFAULT_GC_INTERVAL = 60000;
	/**
	 * The default maximum duration for a garbage collection, beyond which
	 * the explicit gc mechanism is automatically disabled.
	 */
	private static final int DEFAULT_GC_MAX = 8000;
	/**