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

Logical Disk Overview (PI_LOGD)

Function

The Logical Disk Overview (PI_LOGD) record stores the performance data per unit time on reading from, writing to, and areas on the logical partitions on a hard disk drive or fixed disk drive.

This is a multi-instance record.

Notes:

This record collects performance information on hard disks or fixed disk drives. It cannot monitor the performance information of a network disk, for example.

If a character string beginning with Harddisk is displayed for the ID (INSTANCE) field of this record, data cannot be correctly collected for the fields listed below. This phenomenon occurs when the OS cannot recognize the disk volume normally. Furthermore, if _Total is set in the ID (INSTANCE) field, it indicates a total value for the collected records, and thus a correct value cannot be collected. Consequently, if this field is monitored with an alarm, it may report an invalid error.
The Drive Type (DRIVE_TYPE) field is displayed as NO ROOT DIR.
The Page File Size Mbytes (PAGE_FILE_SIZE_BYTES) field and the Total Size Mbytes (TOTAL_DISK_SIZE) field are displayed as 0.

Stop the Agent Collector service before you create, modify, or delete a disk volume (including mounted volumes) in either of the following situations:
- While this record is being collected
- While the LogicalDisk object counter is being monitored by using a Windows administration tool (System Monitor or Performance Logs and Alerts) in the Performance console
If a disk volume 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.

If a security setting prevents you from accessing the disk volume that corresponds to the ID (INSTANCE) field of this record, no record is created for the disk volume. If you need to create a record for this disk volume, specify a security setting that allows access by a SYSTEM user account.

If the startup type of the Windows Management Instrumentation service (service name: WinMgmt), which provides the OS system management information, is set to Disable, the Page File Size Mbytes field cannot be collected.

This record cannot be used for monitoring the disk usage at each mount point created by using the Windows folder mount function.

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_LOGD_INSTANCE

Lifetime

From the time a disk drive is configured until its configuration is modified

Record size

Fixed portion: 681 bytes

Variable portion: 700 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 Usage(PCT_DISK_USAGE) Percentage of the disk space being used (%). # % float No -- 100 - PCT_FREE_SPACE

% Disk Write Time(PCT_DISK_WRITE_TIME) Percentage of time the disk was busy when a write request was processed (%). % float No -- --

% Free Space(PCT_FREE_SPACE) Percentage of the free disk space (%). # % float No -- --

% Idle Time(PCT_IDLE_TIME) Percentage of the time the disk was idle (%). % float No -- --

Available Space Mbytes(FREE_DISK_SIZE) Same value as that in the Free Mbytes field. # AVG ulong 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 in the disk that were waiting to be processed or are currently 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 -- --

Drive Type(DRIVE_TYPE) Disk type. The following values are valid:
- FIXED
- NO ROOT DIR
- REMOVABLE
- DRIVE UNKNOWN COPY string(36) No -- --

Free Mbytes(FREE_MEGABYTES) Free disk space as part of the total usable area (MB). If this field is summarized in a historical report, the minimum value is displayed. # LO ulong No -- --

ID(INSTANCE) Logical disk volume name.
(that is, C: or D:) 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)

Page File Size Mbytes(PAGE_FILE_SIZE_BYTES) Physical size (in megabytes) of the valid paging file allocated to the drive. In Windows NT, the value of this field is always 0. # COPY double No 2008(x86),
2008(x64) ReturnValue / 1MB

Record Time(RECORD_TIME) Time at which the record was created. COPY time_t No -- --

Record Type(INPUT_RECORD_TYPE) Record name. Always LOGD. 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 -- --

Total Size Mbytes(TOTAL_DISK_SIZE) Disk size (MB). # COPY double No -- (total-number-of-clusters-on-the-disk x number-of-sectors-per-cluster x number-of-bytes-per-sector) / 1 MB

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 Usage(PCT_DISK_USAGE)	Percentage of the disk space being used (%). #	%	float	No	--	100 - PCT_FREE_SPACE
% Disk Write Time(PCT_DISK_WRITE_TIME)	Percentage of time the disk was busy when a write request was processed (%).	%	float	No	--	--
% Free Space(PCT_FREE_SPACE)	Percentage of the free disk space (%). #	%	float	No	--	--
% Idle Time(PCT_IDLE_TIME)	Percentage of the time the disk was idle (%).	%	float	No	--	--
Available Space Mbytes(FREE_DISK_SIZE)	Same value as that in the Free Mbytes field. #	AVG	ulong	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 in the disk that were waiting to be processed or are currently 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	--	--
Drive Type(DRIVE_TYPE)	Disk type. The following values are valid: - FIXED - NO ROOT DIR - REMOVABLE - DRIVE UNKNOWN	COPY	string(36)	No	--	--
Free Mbytes(FREE_MEGABYTES)	Free disk space as part of the total usable area (MB). If this field is summarized in a historical report, the minimum value is displayed. #	LO	ulong	No	--	--
ID(INSTANCE)	Logical disk volume name. (that is, C: or D:)	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)
Page File Size Mbytes(PAGE_FILE_SIZE_BYTES)	Physical size (in megabytes) of the valid paging file allocated to the drive. In Windows NT, the value of this field is always 0. #	COPY	double	No	2008(x86), 2008(x64)	ReturnValue / 1MB
Record Time(RECORD_TIME)	Time at which the record was created.	COPY	time_t	No	--	--
Record Type(INPUT_RECORD_TYPE)	Record name. Always LOGD.	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	--	--
Total Size Mbytes(TOTAL_DISK_SIZE)	Disk size (MB). #	COPY	double	No	--	(total-number-of-clusters-on-the-disk x number-of-sectors-per-cluster x number-of-bytes-per-sector) / 1 MB

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