I've searched and found useful documents regarding virtualization, but I can't tell if they are not outdated and still I'm left with some questions.
A) Say you have a physicall server with 32GB of RAM (16GB x 2), if you add one more card of 2GB, would it be better? (2GB more but it isn't balanced).
B) What about doing that on a virtualized server. You assign 32Gb and then jump it up to 34GB or 35GB... would that help?
C) Is there a documment about performance tests with different RAM amount? (or a document without test but explanation to help decide)
D) Do all hardware recommendations apply equally to QlikView 11, QlikView 12 and Qlik Sense?
Solved! Go to Solution.
Just to close B (and all of them with it)... So if the HW underneath performs great (with evenly distributed RAM, say 8 cards of 16GB) one can virtualize a server with 33GB of RAM and expect a better performance than having it set up at 32GB?
Yes, in theory the VM with 33GB will perform 'better' than the one with 32GB. But there are many configuration parameters with different VM's so there might be difficulties because of that. Also the performance gain of adding 1GB will be very very small: it's only adding 3% more memory. Eg. if your RAM fills up after 1 hour of extensive use with 32GB, it will probably fill up in 1hour and 2 minutes with the 33GB, so there is not much of a gain.
Yes I know 1GB increment is almost nothing, which is why I chose to use it in the question, if it's true in the most extreme case, then it's true in most obvious ones (incrementing 16GB/50%).
Thank you very much, you've given me valuable information.