Hitachi

JP1 Version 12 JP1/Performance Management - Remote Monitor for Platform Description, User's Guide and Reference


Physical Disk Overview (PI_PDSK)

Organization of this page

Function

The Physical Disk Overview (PI_PDSK) record stores performance data, taken at a specific interval, about physical disks on the monitored host. This is a multi-instance record.

Notes

  • If the connection to the monitored host fails, the information cannot be collected.

  • Note the following points when collecting this record in a Windows environment:

    • If a security setting prevents access to the disk volume that corresponds to the ID (ID) field, no record is created for this disk volume. To create a record of the disk volume, set the security setting in the monitoring target setup to allow the user account specified in User to access the disk volume.

    • If you change the drive letter or drive path of a disk volume, restart the WMI service of the monitoring target you changed. If you try to collect records without restarting it, you might not be able to collect the records from that disk volume. Even if a record is collected, the ID (ID) field might display the disk volume name before the change was made.

  • If the OS of the monitored host is AIX, only the following users can collect this record information:

    • root user

    • User who belongs to both adm and system groups

  • If the OS of the monitored host is AIX, and if you change the device name by using a command such as rendev, performance data is collected for a different instance than the one that was present before the change.

  • If the OS of the monitored host is the Workload Partition (WPAR) environment of AIX V6.1 or later, the information for this record cannot be collected.

  • Information is not collected if TargetType is set to icmp in the monitoring target settings.

  • If the monitored host is running Solaris, and the disk configuration is changed while JP1/PFM - RM for Platform is collecting performance information, PI_PDSK records are not collected.

    Note:

    Changing the disk configuration means that the following command was executed, resulting in a message such as <<device added: xxxx>> being output.

    Command: iostat -x 5 2

Default and changeable values

Item

Default value

Changeable

Collection Interval

300

Y

Collection Offset

0

Y

Log

No

Y

LOGIF

(Blank)

Y

Over 10 Sec Collection Time

No

N

Realtime Report Data Collection Mode

Reschedule

Y

Legend:

Y: Changeable

N: Not changeable

ODBC key field

PI_PDSK_ID

Lifetime

None

Record size

Fields

PFM - View name

(PFM - Manager name)

Description

Smry rule

Grpg rule

Format

Delta

Not sprtd on

Record Type (INPUT_RECORD_TYPE)

The record name. This is always PDSK.

COPY

COPY

char (8)

No

--

Record Time (RECORD_TIME)

Time when the record was created.

COPY

COPY

time_t

No

--

Interval (INTERVAL)

Interval during which the information is collected.

[Units: seconds]

If the data is summarized in historical reports, the last value stored is displayed.

COPY

FIXED

ulong

No

--

VA DeviceID (VADEVICEID)

Device ID of the monitored host.

COPY

COPY

string (256)

No

--

Target Host (TARGET_HOST)

Name of the monitored host.

COPY

FIXED

string (33)

No

--

Polling Time (POLLING_TIME)

Time when performance data was collected on the PFM - RM host.

COPY

FIXED

string (32)

No

--

Target Host Time (TARGET_HOST_TIME)

Time when performance data was collected on the monitored host.

COPY

FIXED

string (32)

No

--

ID (ID)

Windows:

Physical disk number.

Unix:

Device name.

COPY

COPY

string (256)

No

--

Avg Disk Time (AVG_DISK_TIME)

Average operation time for disk I/O.

[Units: seconds]

HILO

AVG

double

No

--

Busy % (BUSY_PERCENT)

Percentage of time the disk was busy with read and write requests.

[Units: %]

In Unix, if a device continuously performs processing, 100 might be exceeded.

HILO

AVG

double

No

--

Read MBytes/sec (READ_MBYTES_PER_SEC)

Speed at which data is transmitted to disk during read processing.

[Units: MB/second]

HILO

AVG

double

No

AIX, HP-UX

Write MBytes/sec (WRITE_MBYTES_PER_SEC)

Speed at which data is transmitted to disk during write processing.

[Units: MB/second]

HILO

AVG

double

No

AIX, HP-UX

Total MBytes/sec (TOTAL_MBYTES_PER_SEC)

Speed at which data is transmitted between disks during read and write processing.

[Units: MB/second]

HILO

AVG

double

No

--

Read Counts/sec (READ_COUNTS_PER_SEC)

Speed of disk reads.

[Units: reads/second]

HILO

AVG

double

No

AIX, HP-UX

Write Counts/sec (WRITE_COUNTS_PER_SEC)

Speed of disk writes.

[Units: writes/second]

HILO

AVG

double

No

AIX, HP-UX

Total Counts/sec (TOTAL_COUNTS_PER_SEC)

Speed of disk reads and writes.

[Units: reads and writes/second]

HILO

AVG

double

No

--

Queue Length (QUEUE_LENGTH)

Windows:

Average number of read and write requests in the disk queue.

Unix:

Device queue length. One item of I/O processing per second is assumed.

HILO

AVG

double

No

--

Ext1 (EXT1)#

Extension field 1

HILO

AVG

double

No

All

Ext2 (EXT2)#

Extension field 2

HILO

AVG

double

No

All

Legend:

--: Supported on all OSs of the monitored hosts.

All: Not supported on any OS of the monitored hosts.

Smry rule: Summary rule

Grpg rule: Grouping rule

Not sprtd on: Not supported on

#

This field is not used for operations.