However the real world peformance has certainly gotten much worse since upgrading from virtualbox 5 to virtualbox 6. EG when running a 4GB VM on my mac it reports 7.90 GB "Memory" and 3.90 GB "Real Mem" (presumably the memory allocated in RAM). One thing worth noting is the memory reported in macintosh "Activity" monitor shows that the "Memory" value is roughly double the "Real Mem" value (when you double the "Real mem" value). Please let me know if you need further information As most of us have 16GB of ram, this made our machines unusable. I think I was already on 6.1.4, but I don't have a Mojave machine so I can't test this theory.Įveryone in our development team had to install 6.1.2 because we generally allocate 8GB to the virtual machine, which ended up using 16GB. It's possible this bug might specific to Catalina, as I personally only noticed running out on memory after upgrading from Mojave. We couldn't find a bug report about it, but we did find a few reports on the forums: Reverting back to 6.1.2 fixes the problem. allocating 8GB results in 16GB being used.allocating 4GB results in 8GB being used.Allocating 4GB in the VM resulted in a memory usage of 4GB.įrom 6.1.4 onwards, memory is always twice as large as real memory: Up until 6.1.2 memory and real memory were basically the same. Upon investigating the problem we figured out that this issue began with 6.1.4. We recently noticed that memory usage doubled on Catalina (confirmed on 10.15.5).
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