Performance Manager Update Perf Interval
Modifies VirtualCenter Server's built-in historical intervals, within certain limits.
Supported Modifications
| key | samplingPeriod | length | name | level \[1\] | enabled \[2\] |
|---|---|---|---|---|---|
| 1 | 300 \[3\] | 86400 \[4\] | Past day | 1 | true |
| 2 | 1800 | 604800 | Past week | 1 | true |
| 3 | 7200 | 2592000 | Past month | 1 | true |
| 4 | 86400 | 31536000 \[5\] | Past year | 1 | true |
[1] The collection level for the historical intervals can be changed. However, the level specified for a lower-numbered interval cannot be smaller than that of a larger interval. [2] An interval can be disabled. By default, all four intervals are enabled. Disabling an interval disables all higher intervals. For example, disabling interval 3 (“Past month”) also disables interval 4 (“Past year”). [3] Can reduce this interval’s samplingPeriod from 5 minutes to 1, 2, or 3 minutes. [4] Can increase this interval’s length from 1 day to 2 or 3 days. [5] Can increase interval’s length from 1 year to 2 or 3 years.
See PerfInterval for information about the four default intervals for VirtualCenter Server.
Required privileges: Performance.ModifyIntervals
The unique identifier for the managed object to which the method attaches; the serialized managed object reference for a request has the form moType/moId, in this case PerformanceManager/{moId}.
The vSphere release schema. The current specification covers vSphere 8.0.2.0 APIs.
{
"interval": {
"_typeName": "string",
"key": 0,
"samplingPeriod": 0,
"name": "string",
"length": 0,
"level": 0,
"enabled": false
}
}This data object type contains metadata about a performance interval.
- For VirtualCenter Server systems, instances of this data object are referred to as “historical intervals” because they control how data collected from the ESX systems will be aggregated and stored in the database.
- For ESX system, this data object is typically referred to simply as the “interval” or “performance interval” because ESX does not aggregate statistical data.
For ESX systems, a single instance of this data object exists. It cannot be modified. It has these properties:
| key | samplingPeriod | length | name | level | enabled |
|---|---|---|---|---|---|
| 1 | 300 | 129600 | PastDay | null | true |
VirtualCenter Server system provides four instances of this data object by default, that apply globally to all system entities.
Example Collection Levels
VirtualCenter Server uses the specifications configured in its historical intervals to collect metrics from the ESX systems that it manages. The quantity of data collected depends on the level settings for the server, and the level associated with a specific counter. Both factors may change from one version of the products to the next. In general, the lower the number, the smaller the amount of data collected. For VirtualCenter Server 2.5, for example, the levels 1 through 4 collected data as follows:
- Basic counters defined with "average" rollup type for CPU, Memory, Disk, and Network; plus counters for System Uptime, System Heartbeat, and DRS (Distributed Resource Scheduler, tracked in the "clusterServices" group). Does not include counters for devices.
- Counters defined with "average," "summation," and "latest" rollup types for CPU, Memory, Disk, and Network; plus counters for System Uptime, System Heartbeat, and DRS (clusterServices). Does not include counters for devices.
- Counters defined with "average," "summmation," and "latest" rollup types for CPU, Memory, Disk, Network, and all devices; plus counters for System Uptime, System Heartbeat, and DRS (clusterServices).
- All counters defined for all entities and devices, for every rollup type, including “minimum” and “maximum.”
Default properties for the four built-in historical intervals include:
| key | samplingPeriod | length | name | level | enabled |
|---|---|---|---|---|---|
| 1 | 300 | 86400 | Past day | 1 | true |
| 2 | 1800 | 604800 | Past week | 1 | true |
| 3 | 7200 | 2592000 | Past month | 1 | true |
| 4 | 86400 | 31536000 | Past year | 1 | true |
All values are in seconds. The default setting for vCenter Server is level 1, which retains sampled statistical data as follows:
- 5-minute samples for the past day
- 30-minute samples for the past week
- 2-hour samples for the past month
- 1-day samples for the past year
Data older than a year is purged from the vCenter Server database.
Prior to version 2.5 of the API, this data object could be used in conjunction with the CreatePerfInterval operation, to define new, custom historical intervals. That operation has been deprecated: Adding and deleting objects of this type is no longer supported. However, the default historical intervals can be enabled or disabled, and can be modified within certain limits (with the UpdatePerfInterval operation).
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