Very slow visualization for high face count mesh

[MikeCernea]

Hello,

I am trying to visualize a large mesh(more than 50 million vertices and 100 million faces), without texture, but any manipulation is extremely slow(20-30 seconds plus).
I can also see MeshLab does not use almost any resources: CPU is roughly 7%, GPU spikes to 50%, but overall is practically unused, and GPU and RAM are used by a tiny amount(couple of Gb).

I have 24Gb of GPU RAM and 120Gb of RAM, 32 cores, so resources are not the problem, it is just MeshLab is not using them.
I have tested multiple release versions, I have even built the latest source code, but I saw no improvements.
Are there any settings I could crank up to force MeshLab to use more resources and hopefully get more performance?

Thank you!

[alemuntoni]

You probably need to update the value under Tools->Options "MeshLab::System::maxGPUMemDedicatedToGeometry" to a bigger value than 350 (mb), that is the default one.

[MikeCernea]

I did increase pretty much all values at the end, but the one that seems to have solved my problem was increasing the ::system::perBatchPrimitives to 10Mil.
The change however was only visible after a complete PC restart, I do not know why.