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Solarwinds NPM and SAM performance issue

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Hi, hoping someone on here can help me since I'm not getting any responses from support on this issue.  I have unlimited versions of NPM & SAM which are currently monitoring  660 nodes, 1800 volumes, and 7600 interfaces.  I have NPM and SAM running on he following box:

VMWare 5.1

O/S 2012 R2

16GB RAM

10 Virtual CPU's running at 3.47 GHZ.

Performance is as follows:

CPU - 10%

memory - 6GB

NIC - HIGH of 10-20mbps

 

My database is on the following:

VMWare 5.1

O/S 2012 R2

SQL 2012

16GB Ram

1 Virtual CPU running at 3.47 GHZ

Solarwinds is the only database on this server.

Performance is as follows:

CPU - 30%

RAM - 14GB (DBA's have sql setup to take 12GB)

NIC - High of  550 kbps

 

NICS are set to Gigibit.

 

I've also set polling of  Nodes, Interface, and Volumes to 240 secs.  They were at 60 secs before hand.  The problem I'm having is that solarwinds is not able to keep up with the amount of data coming in.  My db team uses ignite to monitor our DB's and i've had them keep an eye on the solarwinds DB performace.  Over the last week their doesn't appear to be any issues with the db performance, but my last database update hovers around the 500 minute mark until i reboot the solarwinds app server.  Anybody have an idea's how i can keep this under 1 minute all the times, included when i switch might go out?


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