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Home > Success Center > Netflow Traffic Analyzer (NTA) > NTA - Knowledgebase Articles > Netflow database maintenance

Netflow database maintenance

Table of contents

Updated August 27, 2018

Overview

This article provides information on Netflow database maintenance. 

Environment

All NTA versions

Steps

Reasons for running this wizard:

  • Database Performance is slow.
  • Database File Group has unused space that needs to be reclaimed.
  • Stale resource data (IP Addresses that do not appear in current flows) needs to be removed from the Database.


Precautions:

  • Create a current SQL backup before running this wizard.
  • Stop Orion services on all polling engines.

 

  1. Log into the Orion Primary Server.
  2. Open the Orion NTA program folder (by default, C:\Program Files (x86)\SolarWinds\Orion\NetFlowTrafficAnalysis).
  3. Launch NetflowDatabaseMaintenance.exe.


Explanation of NetFlow Database Maintenance options:

  • Shrink Database logs and Files (default: quick)

Each file within a database can be reduced to remove unused pages. Although the Database Engine will reuse space effectively, there are times when a file no longer needs to be as large as it once was; shrinking the file may then become necessary.

  • Delete expired flow data (default: 1000 IPs at a time, 15 min to process)

This option will remove any flow data for IPs not listed in current flows (30 days). The "note:" listed under this option will report how many expired IPs are currently present in the Database.

  • Re-Index NetFlow data tables (default: Quick)

When any data modification operations are run (INSERT, UPDATE, or DELETE statements) table fragmentation can occur. Re-indexing rebuilds the tables index (similar to a file system defragmentation) which can greatly improve performance.

After completing the Database Maintenance Wizard a log file will be generated in the same directory named: DatabaseMaintenance.log.

This file will list all actions committed by the wizard.

 

 

 

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