Go to main content
Oracle® ZFS Storage Appliance Analytics Guide, Release 2013.1.4.0

Exit Print View

Updated: April 2015
 
 

How to Determine the Impact of a Dynamic Statistic

For this example task we will determine the impact of "Protocol: NFSv3 operations per second broken down by file name":

  1. Go to Open Worksheets.
  2. Add the statistic: "Protocol: NFSv3 operations per second as a raw statistic". This is a static statistic and will have negligible performance impact.
  3. Create steady NFSv3 load; or wait for a period of steady load.
  4. Add the statistic: "Protocol: NFSv3 operations per second broken down by filename". As this statistic is being created, you may see a temporary sharp dip in performance.
  5. Wait at least 60 seconds.
  6. Close the by-filename statistic by clicking on the close icon.
  7. Wait another 60 seconds.
  8. Now examine the "Protocol: NFSv3 operations per second as a raw statistic" graph by pausing and zooming out to cover the previous few minutes. Was there a drop in performance when the by-filename statistic was enabled? If the graph looks erratic, try this process again - or try this with a workload that is more steady.
  9. Click on the graph to see the values at various points, and calculate the percentage impact of that statistic.