Batch Metrics

Metric Name	Type	Components	Purpose
processed_count	Counter	Batch peer	Count of items processed.
processed_failure	Counter	Batch peer	Count of processing failures.
rows_read	Counter	Batch peer	Count of rows read.
processing_duration_histo	Histogram	Batch peer	Histogram of batch processing durations in milliseconds.
processing_duration_summary	Summary	Batch peer	Summary of batch processing durations in milliseconds.