Troubleshooting the Performance and Capacity Monitor

How can I determine whether performance data is being collected?

The Performance and Capacity Monitor home page includes a Data Collection status indicator on the home page. If the status is On, the Performance and Capacity Monitor function is collecting data from that server. If the status is Off, the Performance and Capacity Monitor function is not collecting data from that server. For more information about collecting data from your system, see Enabling data collection.

What permission do I need to view the managed system utilization data?

You must have List Utilization Data access permission for the managed system to view the performance data for that server. For more information about user roles and permissions, see HMC tasks, user roles, IDs, and associated commands.

What happens if I power off the system while Performance and Capacity Monitor is still enabled?

If you power off a PCM-enabled system, Performance and Capacity Monitor does not get disabled automatically. Instead, the Performance and Capacity Monitor data collection that happens in the background is stopped. However, the status of Performance and Capacity Monitor for the PCM-enabled system is still displayed as On in the graphical user interface (GUI) and in Representational State Transfer (REST). When the system is powered on again, Performance and Capacity Monitor restarts data collection, as usual.

Why was data not collected for my server even though I enabled data collection?

You can enable data collection for servers that are in any state. However, the Performance and Capacity Monitor collects data in the Hardware Management Console (HMC) only when the server is in running or in the operational state. The Performance and Capacity Monitor automatically disables collection, if the server is not in running or operational state for 30 minutes or longer.

Why does the home page not display data even though I enabled data collection?

If you access the Performance and Capacity Monitor home page before the initial data is collected, the Performance and Capacity Monitor displays a status message. The status message indicates that data is not yet available and recommends that you go to the home page again later. The initial time that is required to collect the information is about 15 minutes.

Why is my physical adapter not displayed under the PCM data?

If a storage adapter is not connected to a device, that adapter does not appear under the Performance and Capacity Monitor data, as there is no utilization for that adapter.

Why are the Performance and Capacity Monitor graphs not displayed, and instead I see only the "Fetching PCM Data" message?

You must clear the browser cache and cookies, and then try again.

Why is the home page not showing data for the entire length of time I chose?

The Performance and Capacity Monitor home page can show only the amount of data that the server stored since you enabled data collection. For example, if you want to collect data for 250 days and if you immediately access the home page, you can view only the data that represents the minute or minutes that passed since you enabled data collection.

In addition, the maximum number of days for which the Performance and Capacity Monitor collects data is 366. As a result, the Performance and Capacity Monitor shows a maximum of 366 days of data only.

Why do I see gaps in the data that is displayed in the collection graphs?

If you disable the data collection and re-enable it, or if the server stopped collecting data because the server stopped running, or it is no longer operational, the Performance and Capacity Monitor shows gaps that represent the missing time intervals.

Can I see utilization data after I disable the data collection?

Yes, the Performance and Capacity Monitor maintains utilization data after data collection is disabled. You can view the historic data from the Performance and Capacity Monitor home page of your server. For more information, see Accessing the Performance and Capacity Monitor home page.

Why do I receive a message that indicates that network or storage resources are not available to display?

If you dedicate network and storage resources to a single partition on your server, network and storage utilization data is not available. Network and storage utilization data shows how each of the partitions on your server is using network and storage resources that are managed by Virtual I/O Servers. You can compare the data among partitions to determine whether a partition is overloaded or under-used. However, if a single partition is entitled to dedicated network and storage resources, there is no data to compare. In addition, you can also check whether you have the required Virtual I/O Server version. The Performance and Capacity Monitor requires Virtual I/O Server Version 2.2.3, or later to display the Network and Storage data.

Why do I see only a single partition or Virtual I/O Server listed in the Top Resource Consumers graph?

The Top Resource Consumers graph displays up to 10 partitions or Virtual I/O Servers that are using the highest number of units of the resource you chose. However, if you dedicate all of your resources to a single partition or Virtual I/O Server, no other partitions or servers can compete for the resources. As a result, only the partition or Virtual I/O Server for which you dedicated all resources is displayed in the Top Resource Consumers graph.

Similarly, if you have fewer than 10 partitions or Virtual I/O Servers, the Top Resource Consumers graph includes a vertical line for each of your partitions or Virtual I/O Servers. A maximum of 10 partitions or Virtual I/O Servers are included in the Top Resource Consumers graph. If fewer than 10 partitions or Virtual I/O Servers exist, all the partitions or Virtual I/O Servers are displayed.