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Home > Success Center > Netflow Traffic Analyzer (NTA) > Remove old database tables from NTA

Remove old database tables from NTA

Table of contents

Updated January 19, 2017


This article explains how to remove old database tables from NTA.


All NTA versions


To remove the Netflow data previously collected by an earlier installation of the NTA module, you can run a truncate command on some of the NetFlow tables.

Note: All historical data will be lost by clearing these tables.


  1. Open the Orion Database Manager and connect to your SQL server.
  2. Expand the NetPerfMon table for your NPM server and right click the noted tables in Step 6 to select query table.
  3. Input the relative query command for each table listed into the white space, and delete the default select.. query.
  4. Verify that the Read-Write option is selected.
  5. Select Refresh to execute the truncate query command.
  6. Repeat for each of the following tables:
  • truncate table NetFlowSummary1
  • truncate table NetFlowSummary2
  • truncate table NetFlowSummary3
  • truncate table NetFlowDetail_### (where ### is relative to your table instance)
  • truncate table FlowCorrelation

After completing, run a shrink on the database using the Microsoft SQL Manager to clear the unused white space that was created with the truncation. See Microsoft Support documentation for these SQL server steps.



Last modified
21:11, 29 Mar 2017