private void updateChunkingAndSizeMetricsOnSuccessfulPut(PutOperation op) {
    routerMetrics.putBlobSizeBytes.update(op.getBlobProperties().getBlobSize());
    routerMetrics.putBlobChunkCount.update(op.getNumDataChunks());
    if (op.getNumDataChunks() == 1) {
      routerMetrics.simpleBlobPutCount.inc();
    } else {
      routerMetrics.compositeBlobPutCount.inc();
    }
  }
Update chunking and size related metrics - blob size, chunk count, and whether the blob is simple or composite.
@param op the {@link PutOperation} that completed successfully.
ambry-router/src/main/java/com/github/ambry/router/PutManager.java