void partitionLoadTime(long start) {
            partitionLoadTimeSensor.record(time.hiResClockMs() - start);
        }
share-acknowledgement (share-acknowledgement-rate and share-acknowledgement-count) - The total number of offsets acknowledged for share groups (requests to be ack).
record-acknowledgement (record-acknowledgement-rate and record-acknowledgement-count) - The number of records acknowledged per acknowledgement type.
partition-load-time (partition-load-time-avg and partition-load-time-max) - The time taken to load the share partitions.
core/src/main/java/kafka/server/share/SharePartitionManager.java