Hi Community, Need some information regarding metrics type mentioned in flink documentation. https://ci.apache.org/projects/flink/flink-docs-stable/ops/metrics.html
For the checkpoint metrics, below metrics are defined as of type gauge. As per my understanding gauge type is used to represent a value which can increase/decrease whereas counter is used to represent a value which will keep increasing. Below metrics will be keep increasing during the job run. Hence counter can be appropriate metric type for these. Please share your input on this. numberOfCompletedCheckpoints The number of successfully completed checkpoints. Gauge numberOfFailedCheckpoints The number of failed checkpoints. Gauge totalNumberOfCheckpoints The number of total checkpoints (in progress, completed, failed). Gauge Also "isBackPressured" metric by the name it indicates as it returns boolean value Yes/No. Flink documentation says backpressure is measured as below, * OK: 0 <= Ratio <= 0.10 * LOW: 0.10 < Ratio <= 0.5 * HIGH: 0.5 < Ratio <= 1 What exactly this metric reports ? isBackPressured Whether the task is back-pressured. Gauge Thanks, Suchithra
