If you're in diag mode ("priv set diag") you get many more counters to monitor. Included are lots of SIS counters:
fas3020c2*> stats list counters sis
Counters for object name: sis
state
status
progress
schedule
last_operation_begin
last_operation_end
last_operation_size
last_operation_error
changelog_usage
stage
num_fingerprint_gathered
gathering_begin
num_fingerprint_sorted
num_duplicate_blks_found
sorting_begin
num_blks_deduplicated
dedup_begin
num_fingerprint_deleted
checking_begin
saving
percent_saved
num_succeeded_op
num_started_op
num_deferred_op
num_stopped_op
num_failed_op
total_sorted_blocks
num_same_fingerprint
num_max_reference_hits
num_staled_recipient
num_staled_donor
num_file_too_small
num_out_of_space
total_blk_cnt
total_op_time
total_verify_time
num_fp_deleted
blks_used
blks_shared
share_saved_blks
num_sis_files
num_blks_mismatch
num_deleted_inode_records
num_blks_vol_dense_metadata
ref_count_histogram
block_sharing_histogram
total_blocks_processed_history
total_time_taken_history
num_stale_blks_mismatch
fas3020c2*> stats list instances sis
Instances for object name: sis
/vol/slesxX_ATA
/vol/slesxX_LocalEnvCVLT
/vol/slesxX_LocalEnvEMA
/vol/slesxX_LocalEnvNAE3S2
/vol/slesxX_LocalEnvNAE5
/vol/slesxX_LocalEnvNAE6
fas3020c2*>
-Michael