Physical Disk Overview (PI_PHYD)
- Organization of this page
Function
The Physical Disk Overview (PI_PHYD) record stores the performance data per unit time on reading from, writing to, and transfers involving a hard disk drive or fixed disk drive. The total or average value for partitioned logical partitions is used for a physical disk.
This is a multi-instance record.
- Notes:
-
-
If you add or delete a physical disk volume while this record is being collected or while the PhysicalDisk object counter is being monitored using one of the Windows administration tools, System Monitor or Performance Logs and Alerts in the Performance console, restart the Agent Collector service.
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If a physical disk is not displayed in the ID (INSTANCE) field even after the Agent Collector service is restarted, restart the OS. If you collect records without a restart, items cannot be correctly collected.
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Default values and values that can be specified
|
Item |
Default value |
Modifiable |
|---|---|---|
|
Collection Interval |
60 |
Yes |
|
Collection Offset# |
0 |
Yes |
|
Log |
No |
Yes |
|
LOGIF |
Blank |
Yes |
|
Over 10 Sec Collection Time |
No |
No |
|
Realtime Report Data Collection Mode |
Reschedule |
Yes |
- #
-
A value between 0 and 32,767 seconds can be specified (a value within the range specified for Collection Interval). Use this item to distribute the collection load, because executing data collection all at once results in concentration of the processing workload. Note that the data collection duration to be recorded is the same as the Collection Interval, regardless of the value specified for Collection Offset.
ODBC key fields
PI_PHYD_INSTANCE
Lifetime
From the time a hard disk is configured until a hard disk is added, deleted, or the configuration is modified
Record size
-
Fixed portion: 681 bytes
-
Variable portion: 596 bytes
Fields
|
PFM-View name (PFM - Manager name name) |
Description |
Smry |
Format |
Delta |
Not sprtd on |
Data source |
|---|---|---|---|---|---|---|
|
% Disk Read Time (PCT_DISK_READ_TIME) |
Percentage of time the disk was busy when a read request was processed (%). |
% |
float |
No |
-- |
-- |
|
% Disk Time (PCT_DISK_TIME) |
Percentage of time the disk was busy when a read or write request was processed (%). Normally, if this value continues to be close to 100%, it indicates heavy use of the disk. |
% |
float |
No |
-- |
-- |
|
% Disk Write Time (PCT_DISK_WRITE_TIME) |
Percentage of time the disk was busy when a write request was processed (%). |
% |
float |
No |
-- |
-- |
|
% Idle Time (PCT_IDLE_TIME) |
Percentage of the time the disk was idle (%). |
% |
float |
No |
-- |
-- |
|
Avg Disk Bytes/Read (AVG_DISK_BYTES_PER_READ) |
Average number of bytes transferred from the disk during read operations (bytes/operation). |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Bytes/Write (AVG_DISK_BYTES_PER_WRITE) |
Average number of bytes transferred to the disk during write operations (bytes/operation). |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Bytes/Xfer (AVG_DISK_BYTES_PER_TRANSFER) |
Average number of bytes transferred between disks during write or read operations (bytes/operation). Normally, the larger the transfer size, the more efficiently the system is operating. |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Queue Length (AVG_DISK_QUEUE_LENGTH) |
Average number of write and read requests that entered the disk's queue. |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Read Queue Length (AVG_DISK_READ_QUEUE_LENGTH) |
Average number of read requests that entered the disk's queue. |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Secs/Read (AVG_DISK_SEC_PER_READ) |
Average time it took to read data from the disk (seconds). |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Secs/Write (AVG_DISK_SEC_PER_WRITE) |
Average time it took to write data to the disk (seconds). |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Secs/Xfer (AVG_DISK_SEC_PER_TRANSFER) |
Average time it took for disk transfers (seconds). |
AVG |
float |
No |
-- |
-- |
|
Avg Disk Write Queue Length (AVG_DISK_WRITE_QUEUE_LENGTH) |
Average number of write requests that entered the disk's queue. |
AVG |
float |
No |
-- |
-- |
|
Current Disk Queue Length (CURRENT_DISK_QUEUE_LENGTH) |
Number of requests remaining on the disk that were waiting to be processed or currently are being processed. Normally, if the queue length continues to exceed 2, it indicates processor congestion.# |
AVG |
ulong |
No |
-- |
-- |
|
Disk Bytes/sec (DISK_BYTES_PER_SEC) |
Speed at which data was transferred between disks during write or read operations (bytes/second). Normally, the higher the transfer speed, the more efficiently the system is operating. |
AVG |
float |
No |
-- |
-- |
|
Disk Read Bytes/sec (DISK_READ_BYTES_PER_SEC) |
Speed at which data was transferred to the disk during read operation (bytes/second). |
AVG |
float |
No |
-- |
-- |
|
Disk Reads/sec (DISK_READS_PER_SEC) |
Disk read processing speed (reads/second). |
AVG |
float |
No |
-- |
-- |
|
Disk Write Bytes/sec (DISK_WRITE_BYTES_PER_SEC) |
Speed at which data was transferred to the disk during write operation (bytes/second). |
AVG |
float |
No |
-- |
-- |
|
Disk Writes/sec (DISK_WRITES_PER_SEC) |
Disk write processing speed (writes/second). |
AVG |
float |
No |
-- |
-- |
|
Disk Xfers/sec (DISK_TRANSFERS_PER_SEC) |
Disk read and write processing speed (transfers/second). |
AVG |
float |
No |
-- |
-- |
|
ID (INSTANCE) |
Physical disk number. |
COPY |
string (256) |
No |
-- |
-- |
|
Interval (INTERVAL) |
Collection interval during which the record was stored (seconds). For a real-time report, the first value is 5. If records are summarized into a historical report, the last stored value is displayed. |
COPY |
ulong |
No |
-- |
RECORD_TIME (T1) - RECORD_TIME (T0) |
|
Interval2 (INTERVAL2) |
Collection interval during which the record was stored (seconds). For a real-time report, the first value is 5. If records are summarized into a historical report, the total of the summarized records is displayed. |
ADD |
ulong |
No |
-- |
RECORD_TIME (T1) - RECORD_TIME (T0) |
|
Record Time (RECORD_TIME) |
Time at which the record was created. |
COPY |
time_t |
No |
-- |
-- |
|
Record Type (INPUT_RECORD_TYPE) |
Record name. Always PHYD. |
COPY |
char (8) |
No |
-- |
-- |
|
Split IO/Sec (SPLIT_IO_PER_SEC) |
Number of I/Os into which an I/O to the disk was split (splits/second). I/O splitting occurs when an I/O is too large to fit in a single I/O or when the disk requests data in fragmented sizes. |
AVG |
float |
No |
-- |
-- |
- Legend:
-
Smry: Summary
Not sprtd on: Not supported on