Job Management Partner 1/Performance Management - Agent Option for Platform Description, User's Guide and Reference

Physical Disk Overview (PI_PHYD)

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.

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.

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

Item	Default value	Modifiable
Collection Interval	60	Yes
Collection Offset	0	Yes
Log	No	Yes
LOGIF	Blank	Yes

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) Description Summary Format Delta Not Supported versions 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 -- --

PFM-View name (PFM-Manager name)	Description	Summary	Format	Delta	Not Supported versions	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	--	--

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