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Home > Success Center > Network Performance Monitor (NPM) > CustomPollerStatistics Tables are very large

CustomPollerStatistics Tables are very large

Overview

The CustomPollerStatistcs tables are very large and this is impacting Database Query Performance or our Database Maintenance. 

 

dbo.CustomPollerStatistics_Detail

dbo.CustomPollerStatistics_Hourly

dbo.CustomPollerStatistics_Daily

Environment

  • All versions of NPM

 

Cause 

The CustomPollerStatistics table stores historical data from Custom Pollers (Universal Device Pollers). A single tabular Poller is capable of returning 1000's of  rows, this is likely the cause.

 

Resolution

  1. Run the following SQL query to identify the pollers with the most data:


    select count(*) as total,  custompollerassignmentid from custompollerstatistics_detail
    group by custompollerassignmentid
    order by total desc

     

    Total CustomPollerAssignmentID
    1070045661 77AFC200-EC56-4F52-9C77-CB5EFE4BA697
    100024 54FEA200-AB56-4B52-9A53-CB5EFE4BA697
    11224 2548AB56-4B52-9A53-CB5EFE4BA697
    322 3AE542D3-2A56-8A53-CB5EFE4BA697


     

  2. Run the following query to find which nodes are assigned to that poller:

    Select * from CustomPollerAssignment
    Where CustomPollerASsignmentID={ID}

     
    CustomPollerAssignmnetID AssignmentName CustomPollerID NodeID
    9DA098CC-1BED-4DBE-9D89-08856BA6AB3B ciscoEnvMonTemperatureStatusValue on Bas-2621.lab.tex 61A9A17E-29FC-4077-9367-A3114B48E23B 59

     
  3. Disable Historical Data on that Poller or unassign that poller. 

 

 

 

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