text: To verify that the statistics collection interval, display the system properties again, as shown in 
  Example A-2. 
  
  Example A-2 Statistics collection status and frequency 
  
  IBM_Storwize:ITSO-V7k:superuser>lssystem 
  **statistics_status on**
  **statistics_frequency 2**
  -- The output has been shortened for easier reading. -- 
  
  It is not possible to stop statistics collection with the command**stopstats**starting with V8.1. 
  
  **Collection intervals:**Although more frequent collection intervals provide a more detailed 
  view of what happens within IBM Spectrum Virtualize and Storwize V7000, they shorten 
  the amount of time that the historical data is available on the IBM Spectrum Virtualize. For 
  example, rather than a 240-minute period of data with the default 15-minute interval, if you 
  adjust to 2-minute intervals, you have a 32-minute period instead. 
  
  Statistics are collected per node. The sampling of the internal performance counters is 
  coordinated across the cluster so that when a sample is taken, all nodes sample their internal 
  counters at the same time. It is important to collect all files from all nodes for a complete 
  analysis. Tools, such as IBM Spectrum Control, perform this intensive data collection for you. 