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Not applicable

How to estimate server requirements

Hi, any tips on how to estimate memory requirements?

For example I have 20 apps averaging 35MB each & 50 concurrent users - how much memory do I need to have as a minimum on the server??

Help appreciated

NW

7 Replies
vgutkovsky
Honored Contributor II

How to estimate server requirements

As a rough estimate, for a setup like this you would need about 9GB dedicated to QlikView, plus about 120MB for QlikView overhead, plus an additional 1.5 GB for Windows overhead, so you should be OK with 11GB total.

Regards,

luis_idrovo
Contributor

Re: How to estimate server requirements

Hi Vlad,

I have a similar case, but can you explain how calculated this values please?

Regards

vgutkovsky
Honored Contributor II

Re: How to estimate server requirements

Luis,

The general algorithm is:

M[1...n] = 6x * (1 + 0.1y)

where

x = Size of each application on the HD;

y = Number of concurrent users of each application; and

M = Memory needed for each application.

Perform this calculation for each published QV application, add the results together, add a little bit more for Windows and general overhead, and you have a rough memory estimate. Caution: if your data model is not optimized, I've seen the '6' in the equation go as high as '13'

Hope this helps,

Vlad

Not applicable

Re: How to estimate server requirements

It’s hard to define the hardware sizing without having the story and the whole scenario. You also need to plan for the future in this case.

In rouge case, you can calculate the application usage with this formula:

(file size on disk 35MB) (in RAM 35 * 4 = 140 * 10%(Extra per User))

Conclusion: In RAM 140 + (14 * 50) = 840MB / Application

*These are rouge calculations!!!

You can find more information in the enterprise framework. Or you can contact me for consultation.

Good luck!

Daniel Ohlsson

Affecto Sweden AB

luis_idrovo
Contributor

Re: How to estimate server requirements

Hi Daniel,

For your example, Strengthen me one thing. when you multiply by 50 is because it is made for 50 users?

Regards

Not applicable

Re: How to estimate server requirements

Correct! The 10% are the amount of memory’s that’s being “allocated” to each new user.

I think there is more information regarding this in the server reference manual.

//Daniel

dcj
Valued Contributor II

Re: How to estimate server requirements