This is a list from the help from NetApp Management Console Help. You can identify counters by using the list of performance counters that collect data for each performance object. The following are the descriptions of counters for objects. Availability of counters and their descriptions might vary with the version of Data ONTAP.

total_transfers	Total number of disk operations serviced by the aggregate per second
user_reads	Number of user read operations serviced by the aggregate per second
user_writes	Number of user write operations serviced by the aggregate per second
cp_reads	Number of read operations to the aggregate per second during consistency point processing
user_read_blocks	Number of blocks transferred for user read operations per second
user_write_blocks	Number of blocks transferred for user write operations per second
cp_read_blocks	Number of blocks transferred for consistency-point read operations per second

cifs_ops	Total number of CIFS operations
cifs_op_count	Array of select CIFS operation counts
cifs_ops_pct	Array of select CIFS operation counts as a percentage of total CIFS operations
cifs_latency	Average latency for CIFS operations in milliseconds
cifs_latency_base	Total observed CIFS operations to be used as a base counter for CIFS average latency calculation
cifs_read_ops	Total number of CIFS read operations per second
cifs_write_ops	Total number of CIFS write operations per second

total_transfers	Total number of disk operations serviced by the aggregate per second
user_reads	Number of user read operations serviced by the aggregate per second
user_writes	Number of user write operations serviced by the aggregate per second
cp_reads	Number of read operations to the aggregate per second during consistency point processing
guaranteed_reads	Number of disk read operations initiated each second for RAID reconstruct and scrubbing activities
guaranteed_writes	Number of write operations initiated each second for RAID reconstruct or scrubbing activities
user_read_chain	Average number of blocks transferred in each user read operation
user_write_chain	Average number of blocks transferred in each user write operation
cp_read_chain	Average number of blocks transferred in each consistency-point read operation during a consistency point
guaranteed_read_chain	Average number of blocks transferred in each guaranteed read operation
guaranteed_write_chain	Average number of blocks transferred in each guaranteed write operation
user_read_blocks	Number of blocks transferred for user read operations per second
user_write_blocks	Number of blocks transferred for user write operations per second
cp_read_blocks	Number of blocks transferred for consistency-point read operations per second
guaranteed_read_blocks	Number of blocks transferred for guaranteed read operations per second
guaranteed_write_blocks	Number of blocks transferred for guaranteed write operations per second
user_read_latency	Average latency per block in microseconds for user read operations
user_write_latency	Average latency per block in microseconds for user write operations
cp_read_latency	Average latency per block in microseconds for consistency-point read operations
guaranteed_read_latency	Average latency per block in microseconds for guaranteed read operations
guaranteed_write_latency	Average latency per block in microseconds for guaranteed write operations
base_for_disk_busy	Time base for disk_busy calculation
disk_busy	Percentage of time there was at least one outstanding request to the disk
skip_blocks	Number of blocks skipped in skip-mask write operations per second
user_skip_write_ios	Number of disk skip-write operations initiated each second for storing data or metadata associated with user requests
user_writes_in_skip_mask	Number of disk write IOs that were executed as part of a skip-mask write

fcp_ops	FCP operations per second
fcp_write_data	FCP bytes written per second
fcp_read_data	FCP bytes read per second
fcp_read_latency	Average latency of read operations observed over all LUNs in the system accessed over FCP in milliseconds
fcp_read_ops	Total number of read operations observed over all LUNs in the system accessed over FCP
fcp_write_latency	Average latency of write operations observed over all LUNs in the system accessed over FCP in milliseconds
fcp_write_ops	Total number of write operations observed over all LUNs in the system accessed over FCP
fcp_latency	Average latency for FCP operations in milliseconds

recv_packets	Packets received per second
recv_errors
send_packets	Packets sent per second
send_errors	Errors per second while sending packets
collisions	Collisions per second on CSMA interfaces
recv_data	Total bytes received per second
send_data	Total bytes sent per second
recv_mcasts	Packets received per second via multicast
send_mcasts	Packets sent per second via multicast
recv_drop_packets	Receive packets dropped per second

iscsi_ops	iSCSI operations per second
iscsi_write_data	iSCSI bytes written per second
iscsi_read_data	iSCSI bytes read per second
iscsi_read_latency	Average latency of read operations observed over all LUNs in the system accessed over iSCSI in milliseconds
iscsi_read_ops	Total number of read operations observed over all LUNs in the system accessed over iSCSI
iscsi_write_latency	Average latency of write operations observed over all LUNs in the system accessed over iSCSI in milliseconds
iscsi_write_ops	Total number of write operations observed over all LUNs in the system accessed over iSCSI
iscsi_latency	Average latency for ISCSI operations in milliseconds

read_ops	Read operations per second
write_ops	Write operations per second
other_ops	Other operations per second
read_data	Read bytes per second
write_data	Write bytes per second
queue_full	Queue full responses per second
total_ops	Total number of operations on the LUN per second
avg_latency	Average latency in milliseconds for all operations on the LUN
queue_depth_lun	queue depth for the LUN
avg_read_latency	Average read latency in milliseconds for all operations on the LUN
avg_write_latency	Average write latency in milliseconds for all operations on the LUN
avg_other_latency	Average other ops latency in milliseconds for all operations on the LUN

nfsv3_ops	Total number of NFSv3 operations
nfsv3_op_count	Array of select NFSv3 operation counts
nfsv3_op_latency_base	Array of select NFSv3 operation counts for latency calculation
nfsv3_op_percent	Array of select NFSv3 operations as a percentage of total NFSv3 operations
nfsv3_op_latency	Array of latencies of select NFSv3 operations
nfsv3_avg_op_latency	Average latency of the NFSv3 operations
nfsv3_read_size_histo	Histogram of NFSv3 read sizes
nfsv3_write_size_histo	Histogram of NFSv3 write sizes
nfsv3_read_latency	Average latency for NFSv3 read operations in milliseconds
nfsv3_read_ops	Total observed NFSv3 read operations
nfsv3_write_latency	Average latency for NFSv3 write operations in milliseconds
nfsv3_write_ops	Total observed NFSv3 write operations

nfsv4_ops	Number of total NFSv4 operations per second
nfsv4_op_latency	Array of latencies of select NFSv4 operations
nfsv4_read_ops	Number of NFSv4 read operations per second
nfsv4_avg_latency	Average latency of an NFSv4 request
nfsv4_write_ops	Number of NFSv4 write operations per second

sk_switches	Number of sk switches
hard_switches	Number of context switches
domain_busy	Array of processor time in percentage spent in various domains
processor_busy	Percentage of elapsed time that the processor is executing non-idle processes
processor_elapsed_time	Wall-clock time since boot, used for calculating processor utilization

Note: To minimize negative performance impact on storage systems that it monitors, Performance Advisor does not automatically generate default performance views for its qtree performance |
objects; however, you can use the following counters to define performance views for individual qtrees.

nfs_ops	NFS operations per second
cifs_ops	CIFS operations per second

nfsv3_ops	NFS operations per second
nfsv4_ops	NFS operations per second
cifs_ops	CIFS operations per second
http_ops	HTTP operations per second
dafs_ops	DAFS operations per second
fcp_ops	FCP operations per second
iscsi_ops	iSCSI operations per second
net_data_recv	Network KB received per second
net_data_sent	Network KB sent per second
disk_data_read	Disk KB read per second
disk_data_written	Disk KB written per second
cpu_busy	Percentage of time one or more processors is busy in the system

Note: For systems running Data ONTAP 7.2 or earlier, the cpu_busy counter is the amount of time that any one CPU is busy. This results in a value for cpu_busy that is inflated. For systems running Data ONTAP 7.2.1 or later, the cpu_busy counter is the greater of either average CPU utilization or the busiest domain.

avg_processor_busy	Average processor utilization across all processors in the system
total_processor_busy	Total processor utilization of all processors in the system
num_processors	Number of active processors in the system
cpu_elapsed_time	Elapsed time since boot
nfs_ops	NFS operations per second
read_ops	Read operations per second
write_ops	Write operations per second
time	Time in seconds since the Epoch (00:00:00 UTC, January 1, 1970)
uptime	Time in seconds that the system has been up

cifs_ops	CIFS operations per second
read_ops	Read operations per second
write_ops	Write operations per second
other_ops	Other operations per second
read_data	Read bytes per second
write_data	Write bytes per second
queue_full	SCSI queue full responses per second
protocol_errors	FCP protocol errors per second
invalid_xmit_words	Invalid words transmitted per second
crc_errors	CRC errors per second
lr_sent	LRs sent per second
lr_received	LRs received per second
discarded_frames	Number of frames discarded per second
nos_received	NOSs received per second
ols_received	OLSs received per second
queue_depth_hba	queue depth for the HBA
avg_latency_hba	Average latency in milliseconds for all operations on the HBA
total_ops_hba	Total number of operations on the HBA per second
avg_read_latency_hba	Average read latency in milliseconds for all operations on the HBA
avg_write_latency_hba	Average write latency in milliseconds for all operations on the HBA
avg_other_latency_hba	Average other ops latency in milliseconds for all operations on the HBA

vfiler_cpu_busy	Percentage of CPU capacity utilized per second by the vFiler unit's hosting storage system
vfiler_net_data_recv	Network data received in kilobytes per second
vfiler_net_data_sent	Network data sent in kilobytes per second
vfiler_read_ops	Read operations per second on the vFiler unit
vfiler_write_ops	Write operations per second on the vFiler unit
vfiler_misc_ops	Miscellaneous operations per second on the vFiler unit
vfiler_read_bytes	Data read in kilobytes per second on the vFiler unit
vfiler_write_bytes	Data written in kilobytes per second on the vFiler unit

total_ops	Number of operations per second serviced by the volume
avg_latency	Average latency in milliseconds for all operations on the volume
read_ops	Number of reads per second to the volume
read_data	Bytes read per second from the volume
read_latency	Average time for reads to the volume
write_ops	Number of writes per second to the volume
write_data	Bytes written per second (b_per_sec) to the volume
write_latency	Average time for writes to the volume
other_ops	Number of other operations per second to the volume
other_latency	Average time for other operations to the volume
internal_msgs	Number of internal backdoor messages per second to the volume
read_blocks	Number of blocks read per second from the volume
write_blocks	Number of blocks written per second to the volume
nfs_read_ops	Number of NFS reads per second to the volume
nfs_read_data	Bytes read per second via NFS from the volume
nfs_read_latency	Average time for NFS reads to the volume
nfs_write_ops	Number of NFS writes per second to the volume
nfs_write_data	Bytes written per second via NFS to the volume
nfs_write_latency	Average time for NFS writes to the volume
nfs_other_ops	Number of other NFS operations per second to the volume
nfs_other_latency	Average time for other NFS operations to the volume
cifs_read_ops	Number of CIFS reads per second to the volume
cifs_read_data	Bytes read per second via CIFS from the volume
cifs_read_latency	Average time for CIFS reads to the volume
cifs_write_ops	Number of CIFS writes per second to the volume
cifs_write_data	Bytes written per second via CIFS to the volume
cifs_write_latency	Average time for CIFS writes to the volume
cifs_other_ops	Number of other CIFS operations per second to the volume
cifs_other_latency	Average time for other CIFS operations to the volume
san_read_ops	Number of block protocol reads per second to the volume
san_read_data	Bytes read per second via block protocol from the volume
san_read_latency	Average time for block protocol reads to the volume
san_write_ops	Number of block protocol writes per second to the volume
san_write_data	Bytes written per second via block protocol to the volume
san_write_latency	Average time for block protocol writes to the volume
san_other_ops	Number of other block protocol operations per second to the volume
san_other_latency	Average time for other block protocol operations to the volume