Pools page in the AIX PowerVM view

The Pools page in the AIX PowerVM view provides an overview of configured pools in all hosts (or in the selected host) that includes information such as CPU and memory utilization, CPU entitlement utilization, processor count, and more. All metrics in this view are common to both HMC Only and LPAR instrumented modes.

Scenario

Teresa is an AIX Technology Specialist in an IT organization. She manages and monitors the AIX infrastructure to ensure that there are sufficient resources (CPU, memory, and storage) to meet the current and future capacity requirements.

Teressa wants to know the residual CPU capacity of the pools and details of how the CPU capacity is utilized by the partitions. She would like to get the following information:

  • Check the health of the pools in the AIX infrastructure to make sure that the resources are efficiently utilized.
  • Know whether any partitions are exceeding their entitled utilization or are under-utilizing the CPU capacity.

Alan, an administrator, installs the AIX views and provides the required permissions to Teresa to access the view. With AIX views, Teresa can get an overview of all the available pools in the AIX virtualization environment. To know the residual CPU capacity of the pools, she can review the Pools page in the AIX PowerVM view. This page provides CPU metrics such as total configured, entitlement capacity, and entitlement capacity utilization.

By using the Pool details page, Teressa can check the health of the pools by analyzing how the CPU is utilized over a period of time by partitions and whether she needs to increase or decrease the entitled capacity for any partition.

To access the page, select Views > Virtualization > AIX > PowerVM, and click the Pools tab.

PowerVM pools

The Pools table lists all pools in all hosts (unless filtered on selected hosts using the Hosts filter) contained in the selected domain.

Each row corresponds to a PowerVM pool and shows the following information.

Important

  • Metrics marked with (plus) are displayed only if Active Memory Sharing (AMS) is enabled.
  • By default, some columns are hidden. You can show or hide columns using the action menuthat is located next to the Pools table title. For more information, see Managing charts and tables in Views.

Column

Description

Statistical
Type 
Metrics 

Pool

Name of the pool.

Last valueNAME

Host

Name of the host that contains the pool.

Last valueHost name retrieved using relationship VH_CONTAINS_RP 

Processors

Number of CPU cores configured for the pool.

Last valueCPU_NUM 
CPU Allocated [%]Percentages of CPU utilization of the pool normalized by the cores allocated to the pool.95th percentileCPU_ALLOC_UTIL

CPU Util [%]

CPU capacity used by the pool normalized by the cores allocated to the pool.

95th PercentileCPU_UTIL 

Entitlement Capacity

Sum of entitled capacity of the partitions in the pool expressed in terms of CPU cores.

Last valueCPU_ENTC

Entitlement Consumption

Sum of CPU used by the partitions in the pool expressed in terms of CPU cores.

95th PercentileCPU_ENTC_CONS

Entitlement Util

Sum of CPU used by the partitions in the pool normalized by the sum of entitlement of the partitions in the pool.

Computed metric - based on 95th PercentileComputed using CPU_ENTC_CONS and CPU_ENTC

(plus) Memory [GB]

Total physical memory available for the pool.

Last valueTOTAL_REAL_MEM

(plus) Memory Util [%]

Percentage of memory used by the pool, normalized by the total memory of the host.

95th PercentileMEM_UTIL 
(plus) Memory Over-commitment [%]

The percentage of memory configured for the partitions in the pool over the total memory available in the pool.

Computed metric – Based on Last value of Total Memory [GB] of the partitions and of the poolComputed using TOTAL_REAL_MEM of pool and TOTAL_REAL_MEM of partitions that are part of the Active Memory Sharing (AMS) pool

Pool details

To view the details page for a particular pool, click the name of the pool in the Pools table. The Pool details page displays the following information:

  • General details: General pool details, such as name, type, description, number of elements within it, and tags are displayed at the top of the page. 
  • Related Information panel: Displays links to detailed pages for Thresholds and Partition details.

  • Tags panel: Displays tags, if any, that are associated with the pool.  For more information, see Working with tag filters. 

  • Summary information: The Summary tab, that is displayed by default, displays performance details for the selected pool in a horizontal summary table, as well as charts.

    You can download charts, annotate them, print them, and so on. For more information, see Managing charts 

  • Configuration Details: The Configuration Details tab displays the configuration metrics for the pool.

  • Shared Processor Pools: The Shared Processor Pools tab displays details of any contained shared processor pools, which will be filled only in the case of Multiple Shared-Processor Pools (MSPP).
  • Contained Elements: The Contained Elements section contains a table that displays partition details for each partition present in the selected pool. See Partitions page in the AIX PowerVM view for more information.

Partitions in the Shared Memory Pools

The Shared Processor Pools table shows any contained shared processor pools, which will be filled only in the case of Multiple Shared-Processor Pools (MSPP):

Column

Description

Statistical
Type 
Metrics 
PartitionName of the partition in the shared memory pool tableLast valueNAME
Total Memory [GB]Total memory configured for the partition.Last valueTOTAL_REAL_MEM 
Memory Utilization [%]Memory Utilization of the partition, measured in percentage.95th PercentileMEM_UTIL
Real Memory Utilization [%]Real Memory utilization of the partition, this includes the memory used by processes and excludes the memory assigned to file system cache.95th percentileMEM_REAL_UTIL
AMS ModeActive Memory Sharing mode status. 1 denotes ON, and 0, OFF.Last value

LP_AMS_MODE

 
Granted Memory [GB]Amount of memory assigned to the partition from the shared memory pool. Hypervisor grants memory to the partition based on the needs of the partition and the contention from other partitions within the shared memory pool.Average

MEM_GRANTED

 
Hypervisor Page Ins [Pages/sec]Shows the number of hypervisor page-ins for the partition. A hypervisor page-in occurs if a page being referenced is not available in real memory because it has been paged out by the hypervisor previously. A high value for this metric is an indication of excessive memory-overcommitment.Average

MEM_HYPERVISOR_PAGE_INS

 

Contained Shared pools

The Contained Shared Pools table displays the following columns for all PowerVM pools when the AMS or AME mode is enabled:

Column

Description

Statistical
Type 
Metrics 

Shared Pool

Name of the shared pool.Last valueNAME 
ProcessorsThe number of processors in the shared pool.Last valueCPU_NUM 
CPU EntitlementThe number of CPU cores allocated to the shared pool.Last valueCPU_ENTC 
CPU Utilization [%]Percentage of CPU used by the shared pool, normalized by the number of dedicated processors for DLPAR, and by the number of virtual processors for SPLPAR.95th PercentileCPU_UTIL
CPU Entitlement Used [%]Percentage of CPU used by the shared pool, normalized by the CPU entitlement. This metric is relevant for SPLPARs only.95th Percentile

CPU_ENT_UTIL

 
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