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Home > Success Center > Storage Resource Monitor (SRM) > Storage Resource Monitor (SRM) Getting Started Guide > Performance monitoring > Troubleshooting performance issues

Troubleshooting performance issues

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Created by Anthony.Rinaldi_ret, last modified by Melanie Boyd on Nov 21, 2016

Views: 471 Votes: 0 Revisions: 3
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When monitored values reach warning or critical levels, SRM displays them against an a yellow or red background. To get more information and determine the cause of this, drill down and click.

The following scenario begins with a triggered performance alert, and then shows how to identify the root cause of the issue.

  1. Go to My Dashboards > Storage > Storage Summary to display the All Active Alerts resource. This shows current alerts for storage objects (and all other objects monitored by SolarWinds).

    In this example, an alert entitled "LUN Total Latency is greater than 10ms" has been triggered by the object SYD-2K3-FCHBA:EMC LUN.

    The alert also shows how long it has been active.

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/gsg-srm-performance-alert-1.png

  2. Move the cursor over the triggering object name to display information and any additional issues that exist for the object.

    In this example, the popup shows that as well as displaying high latency, the device has reached total capacity. In some situations this might be enough information for you to take action, but in others you may need to investigate further.

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/gsg-srm-performance-alert-2.png

  3. Click on the name of the triggering object to open the details page.

    The LUN Details resource provides technical information about the device, together with a number of performance resources.

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/srm-gsg-lun-details-1.png

  4. The Performance Summary resource show thelatency for this LUN in relationship to other peformance metrics. By moving the cursor over the chart, you can compare metrics at any time during the last 24 hours.

    Zoom in to display metrics for 24 hours, 12 hours, or 1 hour, or focus on a specific time period using the slider bars below the chart.

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/srm-gsg-performance-summary-with-popup.png

  5. Click on a label (such as Latency)  to expand the information.

    This gives a more detailed record of that metric's performance over time, so you can find precisely when problems are occurring.

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/srm-gsg-lun-latency-performance.png

  6. Back on the LUN Details page, scroll down to the Latency Performance Per Related LUNs resource.

    This shows latency performance for the selected LUN, compared with other LUNs in the same storage pool over the same period. You can see which other LUNs (known as "noisy neighbors") are experiencing high latency at the same time as the LUN you are troubleshooting. Based on the information in this example you might want to:

    • Reallocate the applications that use this LUN to another storage pool
    • Add more resources to the array

    File:Success_Center/Reusable_content_-_InfoDev/SRM/SRM_GSG/Troubleshooting_performance_issues/srm-gsg-latency-performance.png

 
Last modified
15:48, 21 Nov 2016

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