topic Re: Server performance in QlikView

Server performance

andrefpc — Mon, 26 Jan 2026 18:19:17 GMT

Hello community!

I'm facing what seems to me a very strange situation.

I have a customer with a QVS running in a VMWare, the customer believes that the application is very slow. I've tried to reduce the amount of data but still very slow.

This VMWare has 52GB of RAM and 2 CPUs dedicated to QV.

I tried the same application in a server with 32GB of RAM and 2 less powerful processors and the application is much faster.

One thing I've noticed is that in the second server the CPU peeks at 96% when needed but in the first server the maximum CPU usage is 20%.

Any help would be deeply apreciated.

Thanks in advance.

Re: Server performance

roger_stone — Fri, 30 Oct 2015 09:38:27 GMT

In the QMC, what setting have you got for CPU throttling on the VMWare machine?

Re: Server performance

andrefpc — Fri, 30 Oct 2015 09:41:54 GMT

Thanks for your reply Roger.

The throttling is set to 0 (no throttling)

Re: Server performance

roger_stone — Fri, 30 Oct 2015 09:48:07 GMT

OK, next question.

Are you using the IE Plugin on either system?

Re: Server performance

jerrysvensson — Fri, 30 Oct 2015 09:54:09 GMT

Is the VMWare machine configured according to Qliks best practice for QlikView Server on VMWare?

Re: Server performance

andrefpc — Fri, 30 Oct 2015 09:55:39 GMT

No Roger, I'm using Full Browser and Small Device Version on both systems

Re: Server performance

avinashelite — Fri, 30 Oct 2015 09:58:20 GMT

their are several reason to for performance issue, try to check the following things and try to optimize the same

1.size of the application

2.number of concurrent users

3.RAM availability in the server i.e. if some other process is consuming lot of memory that will also have an impact

4.use of calculated dimension in the charts

5.complex calculation in the front end

Re: Server performance

andrefpc — Fri, 30 Oct 2015 10:07:51 GMT

Right now I have a rather small application, 150 MB. At this point I'm the only one accessing this app.

There are no calculated dimensions in the charts but I there some conditional objects. These objects are calculated only when they are visible?

Both machines are dedicated to QV and on my customer machine the maximum CPU utilisation is 25% while on my server is up to 96%, that's whats confusing me, there is no hyperthreading.

Re: Server performance

roger_stone — Fri, 30 Oct 2015 12:49:07 GMT

Andre

Take a look at this, it may help you pin down the problem:

Quick tips #8 - Server Settings For Best Performance