Purpose
Collects RSS data and returns node-specific data.
Definition
REPLACE FUNCTION SYSLIB.MonitorPhysicalResource() RETURNS TABLE (ProcId INTEGER, Status CHAR CHARACTER SET LATIN, AmpCount SMALLINT, PECount SMALLINT, CPUUse FLOAT, PrcntKernel FLOAT, PrcntService FLOAT, PrcntUser FLOAT, DiskUse FLOAT, DiskReads FLOAT, DiskWrites FLOAT, DiskOutReqAvg FLOAT, NetAUse FLOAT, NetReads FLOAT, NetWrites FLOAT, HstBlkRd FLOAT, HstBlkWrts FLOAT, MemAllocates FLOAT, MemAllocateKB FLOAT, MemFailures FLOAT, MemAgings FLOAT, NetAUp CHAR(1) CHARACTER SET LATIN, NetBUp CHAR(1) CHARACTER SET LATIN ) . . . ;
Usage Notes - MonitorPhysicalResource
The MonitorPhysicalResource function returns the detailed resource usage information for each node. Because the function reports on each node, you can isolate performance concerns by node.
The MonitorPhysicalResource function provides similar functionality to the PMPC MONITOR PHYSICAL RESOURCE request. For information about this interface, see MONITOR PHYSICAL RESOURCE.
Result Rows
Column Name | Description |
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ProcId | ID associated with a node. This value is computed as the module number within a cabinet plus the cabinet number times 10000. For example, a node #123 on cabinet #4 would return an INTEGER value of 40123. |
Status | Status of the node associated with this record:
A node is up (U) when it is:
Down (D) represents all other potential states. |
AmpCount | Current number of AMPs currently executing on the associated node. |
PECount | Current number of active PEs on the associated node. |
CPUUse | % of CPU usage not spent being idle. The node-level display is computed from ResUsageSpma table data as: PercntUser + PercntService This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
PrcntKernel | % of CPU resources in idle and waiting for I/O completion. This value is computed from ResUsageSpma data as follows, where NCPUsis the number of CPUs: ((CPUIOWAIT/100) / (NCPUs * SampleSec)) * 100 This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
PrcntService | % of CPU resources spent in PDE user service processing. The value is computed from the ResUsageSpma table data, where x represents the number of CPUs: CPUUServ / (x * SampleSec) This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE.
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PrcntUser | % of CPU resources spent in non-service user code processing. This value is computed from the ResUsageSpma table data, where x represents the number of CPUs: CPUUExec / (x * SampleSec) This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
DiskUse | % of disk usage per node. This value is computed from ResUsageSldv table data as follows, assuming n is the number of vdisks used by this AMP: (LdvOutReqTime 1 + ... + LdvOutReqTime n) / (n*SampleSec) The DiskUse field does not take into account overlapping of operations among multiple storage devices, but it allows for the possibility of multiple requests for the same device. This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
DiskReads | Total number of physical disk reads per node during the collection period. This value is computed from ResUsageSldv table data as follows, assuming n is the number of ldv devices used by this node: LdvReads 1 + ... + LdvReads n This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
DiskWrites | Total number of physical disk writes per node during the collection period. This value is computed from ResUsageSldv table data as: LdvWrites 1 + ... + LdvWrites n This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
DiskOutReqAvg | Average number of outstanding disk requests. The value is computed from ResUsageSldv table data as follows, assuming n is the number of ldv controllers used by this node: ((LdvOutReqSum 1 / NULLIFZERO(LdvOutReqDiv 1)) + … + (LdvOutReqSum n / NULLIFZERO(LdvOutReqDiv n))) / n The range of the value is typically 0 to 25. This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
NetAUse | % of BYNET A usage. This is the actual BYNET receiver usage. (The BYNET transmitter usage is maintained in resource usage separately and is typically lower than the receiver usage. This is caused by multicasts, where one transmitter sends a message to many receivers.) This value is computed from the ResUsageSpma table data as: ((NetSamples - NetTxIdle) / NetSamples) * 100 This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
NetReads | Number of Reads from the BYNET to the node. This value is computed from the ResUsageSpma table data as: NetRxCircBrd + NetRxCircPtP This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
NetWrites | Number of messages written from the node to the BYNET during the collection period. The value is computed from the ResUsageSpma table data as: NetTxCircBrd + NetTxCircPtP This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE.
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HstBlkRds | Number of message blocks (one or more messages sent in one physical group) received from all clients. This value is computed from ResUsageShst data, assuming n is the number of host channel and network connections on this node: HostBlockReads 1 + ... + HostBlockReads n This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
HstBlkWrts | Number of message blocks (that is, one or more messages sent in one physical group) sent to all hosts. This value is computed from ResUsageShst data, assuming n is the number of host channel and network connections on this node: HostBlockWrites 1 + ... + HostBlockWrites n This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
MemAllocates |
This column is obsolete and returns zero or NULL.
|
MemAllocateKB | Value represents the change in node-level memory. MemAllocateKB represents a delta from the previous reporting period. It reports negative values as less memory is used. This value is calculated from the following ResUsageSpma column: MemVprAllocKB This value is NULL if certain conditions apply, see Usage Notes - MONITOR PHYSICAL RESOURCE. |
MemFailures |
This column is obsolete and returns zero or NULL.
|
MemAgings |
This column is obsolete and returns zero or NULL.
|
NetAUp | Status of the BYNETs (if there are more than two, the first two) on a system-wide basis:
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NetBUp | Status of the BYNETs (if there are more than two, the first two) on a system-wide basis:
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Example: Using MonitorPhysicalResource
SELECT t2.* from table (MonitorPhysicalResource()) as t2; *** Query completed. One row found. 28 columns returned. *** Total elapsed time was 1 second. ProcId 10001 Status U AmpCount 4 PECount 2 CPUUse 1.00000000000000E 002 PrcntKernel 0.00000000000000E 000 PrcntService 2.34804329725229E 000 PrcntUser 9.76519567027477E 001 DiskUse 9.08909242298085E 000 DiskReads 8.48000000000000E 002 DiskWrites 6.56500000000000E 003 DiskOutReqAvg 1.58467943380516E-001 NetAUse 0.00000000000000E 000 NetBUse 0.00000000000000E 000 NetReads 0.00000000000000E 000 NetWrites 0.00000000000000E 000 CICUse 0.00000000000000E 000 HstBlkRds 2.00000000000000E 000 HstBlkWrts 1.00000000000000E 000 MemAllocates 0.00000000000000E 000 MemAllocateKB 1.28000000000000E 002 MemFailures 0.00000000000000E 000 MemAgings 0.00000000000000E 000 NVMemAllocate 0.00000000000000E 000 NVMemAllocSegs 0.00000000000000E 000 NVMemAgings 0.00000000000000E 000 NetAUp U NetBUp U