vSAN PMem Performance Graphs in vSphere Web Client
Article ID: 326555
Updated On:
Products
Issue/Introduction
This article explains vSAN Performance Graphs for PMem storage, available in vSAN (formerly known as Virtual SAN) 8.0 and later.
For older graphs in vSAN 6.2 and later see: vSAN Performance Graphs in the vSphere Web Client Part 1.
PMem metrics collection settings are defined by vCenter Server Statistics Settings. By default, only the Level 1 metrics are collected and stored.
Resolution
To view all PMem metrics for a longer period, change statistics collection level configuration in vSphere General Settings dialog.
Note: When you increase the collection level, the storage and system requirements might change. You might need to allocate more system resources to avoid a decrease in the performance.
For troubleshooting purpose, you can consider changing the metrics level collection settings, if you are facing a potential PMem performance issue. You can then change the values back to default, if you do not have the resources to keep the additional metrics for a longer period.
Cluster performance
IOPS
This graph shows iOPS consumed by all VM(s) placed on the PMem datastores of all host of this cluster.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
| Read IOPS | 1 | Read IOPS consumed by all VM(s) on the PMem datastores of all hosts. | iopsRead | cluster-pmem |
| Write IOPS | 2 | Write IOPS consumed by all VM(s) on the PMem datastores of all hosts. | iopsWrite | cluster-pmem |
| Total IOPS | 2 | Total IOPS consumed by all VM(s) on the PMem datastores of all host. | iopsTotal | cluster-pmem |
Latency
This graph shows average latency of IOs generated by all VM(s) placed on the PMem datastores of all hosts of this cluster.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
| Read Latency | 3 | Average read latency of IOs generated by all VM(s) on the PMem datastores of all hosts of this cluster. | latencyRead |
cluster-pmem |
|
Write Latency |
3 |
Average write latency of IOs generated by all VM(s) on the PMem datastores of all hosts of this cluster. | latencyWrite | cluster-pmem |
Bandwidth
This graph shows bandwidth consumed by all VM(s) placed on the PMem datastores of all hosts of this cluster.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
|
Read Bandwidth |
1 |
Read bandwidth consumed by all VM(s) on the PMem datastores of all hosts of this cluster. |
bandwidthRead |
cluster-pmem |
|
Write Bandwidth |
2 |
Write bandwidth consumed by all VM(s) on the PMem datastores of all hosts of this cluster. |
bandwidthWrite |
cluster-pmem |
|
Total Bandwidth |
2 |
Total bandwidth consumed by all VM(s) on the PMem datastores of all hosts of this cluster. |
bandwidthTotal |
cluster-pmem |
Host performance
IOPS
This graph shows iOPS consumed by all VM(s) placed on the PMem datastore of this host.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
| Read IOPS | 1 | Read IOPS consumed by all VM(s) on the PMem datastore of this host. | iopsRead | host-pmem |
| Write IOPS | 2 | Write IOPS consumed by all VM(s) on the PMem datastore of this host. | iopsWrite | host-pmem |
| Total IOPS | 2 | Total IOPS consumed by all VM(s) on the PMem datastore of this host. | iopsTotal | host-pmem |
Latency
This graph shows average latency of IOs generated by all VM(s) placed on the PMem datastore of this host.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
| Read Latency | 3 | Average read latency of IOs generated by all VM(s) on the PMem datastore of this host. | latencyRead | host-pmem |
| Write Latency | 3 | Average write latency of IOs generated by all VM(s) on the PMem datastore of this host. | latencyWrite | host-pmem |
Bandwidth
This graph shows bandwidth consumed by all VM(s) placed on the PMem datastore of this host.
| Metrics | Metric Level | Metric Description | Metric ID in API | Corresponding Entity Type |
|---|---|---|---|---|
| Read Bandwidth | 1 | Read bandwidth consumed by all VM(s) on the PMem datastore of this host. | bandwidthRead | host-pmem |
| Write Bandwidth | 2 | Write bandwidth consumed by all VM(s) on the PMem datastore of this host. | bandwidthWrite | host-pmem |
| Total Bandwidth | 2 | Total bandwidth consumed by all VM(s) on the PMem datastore of this host. | bandwidthTotal | host-pmem |
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