1. `***_total`: This suffix is typically used for counter metrics in Prometheus. A counter is a cumulative metric that represents a single monotonically increasing counter whose value can only increase or be reset to zero on restart. For example,

druid_task_pending_count_total

would represent the total number of pending tasks since the start or since the last reset. This is useful for tracking rates of increase over time. 2. `***_created`: This suffix indicates a gauge that represents the creation time of the corresponding

***_total

counter. It's a Unix epoch timestamp (in seconds) showing when the counter was first created (or reset). For instance,

druid_task_pending_count_created

shows the time when the

druid_task_pending_count_total

counter was initialized or reset. This metric can be useful for understanding the age of the counter or for detecting if a counter has been reset.