Logical Disk Overview (PI_LOGD)
- Organization of this page
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:
-
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This record collects performance information on hard disks or fixed disk drives. It cannot monitor the performance information of a network disk, for example.
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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.
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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.
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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.
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If the startup type of the Windows Management Instrumentation service (service name: Winmgmt) that provides system management information for the OS is set to Disabled, the Page File Size Mbytes field cannot be collected correctly. If the startup type of the Windows Management Instrumentation service is set to Disabled while PFM - Agent for Platform is running, change the startup type to a value other than Disabled, and then restart PFM - Agent for Platform.
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This record cannot be used for monitoring the disk usage at each mount point created by using the Windows folder mount function.
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You cannot use PI_LDSK records to collect performance information for a CSV file system (CSVFS).
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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_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 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 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 |
2012, 2016, 2019 |
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 × number of sectors per cluster × number of bytes per sector) ÷ 1 MB |
- Legend:
-
Smry: Summary
Not sprtd on: Not supported on