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:
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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.
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Information is not collected if TargetType is set to icmp in the monitoring target settings.
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
-
Fixed part: 1,034 bytes
-
Variable part: 652 bytes
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.