Number of executors not executing and available to take work and how it changes over time. @since 1.607 Number of busy executors and how it changes over time. Number of executors in the process of coming on-line and how it changes over time. @since 1.607 Number of executors defined for Jenkins and how it changes over time. @since 1.607 Number of executors not executing and how it changes over time. Note the these executors may not be able to take work, see {@link #availableExecutors}. @since 1.607 Number of executors on-line and how it changes over time. Replaces {@link #totalExecutors} @since 1.607 Number of {@link hudson.model.Queue.BuildableItem}s that can run on any node in this node set but blocked. Number of total executors and how it changes over time. @deprecated use {@link #onlineExecutors}. Note {@code totalExecutors==onlineExecutors} for backward compatibility support. Updated every 1 hour. Keep data up to 4 weeks. Updated every 1 min. Keep data up to 1 day. Updated every 10 seconds. Keep data up to 1 hour.