virtualbox.org

Dear VirtualBox Users,

My host operating system is Windows 10 Home x64.

I am using VirtualBox 5.0.4 r102546. Whenever I start my Lubuntu 15.10 Linux virtual machine, computer memory usage will shoot up to 98% and causes my Windows 10 Home x64 host operating system to slow down almost to a halt. This behavior seems to replicate that of a computer virus. My Lubuntu 15.10 Linux guest is slow and I cannot perform other tasks on my computer while the guest machine is running. If I want to perform other tasks on my computer, I would have to force the virtual machine to shut down. Otherwise, my computer will be as slow as a snail.

I have scanned my Windows 10 Home x64 host operating system with many different anti-virus programs but they cannot find any computer virus, spyware, malware, worms, trojans, or rootkits. Of course, I only have one active and resident anti-virus program but I am using many different free online virus scanners to check my computer for malware.

Will there be a bug fix to VirtualBox 5.0.4 so that it will not consume so much computer memory on Windows 10 hosts?

Thank you very much.

Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore Citizen

You'll need to tell us more before we can say if it's a bug in 5.0.4 or a misconfiguration of the guest. See viewtopic.php?f=24&t=48476

scottgus1 wrote:You'll need to tell us more before we can say if it's a bug in 5.0.4 or a misconfiguration of the guest. See viewtopic.php?f=24&t=48476

Dear scottgus1,

I have a total physical memory of 8 GB on my home desktop computer. Originally, I assigned 4 GB of memory to my Lubuntu 15.10 Linux guest machine. But after lowering my virtual machine's memory from 4 GB to 2 GB, my Windows 10 Home x64 host operating system is still as slow as ever.

So I can quite confirm that it is a bug with VirtualBox 5.0.4 in Windows 10 hosts.

Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore Citizen

Teo En Ming wrote:So I can quite confirm that it is a bug with VirtualBox 5.0.4 in Windows 10 hosts.

Guests run normally for me on my Windows 10 host and they don't slow the host to a noticeable degree so one has to assume it's something with your setup. Attach the VBox.log for your guest (compressed) here.

loukingjr wrote:

Teo En Ming wrote:So I can quite confirm that it is a bug with VirtualBox 5.0.4 in Windows 10 hosts.

Guests run normally for me on my Windows 10 host and they don't slow the host to a noticeable degree so one has to assume it's something with your setup. Attach the VBox.log for your guest (compressed) here.

Dear loukingjr,

I have attached VBox.log (compressed ZIP file) for my Lubuntu 15.10 Linux guest here.

Thank you very much.

Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore Citizen

There are a number of problems…

00:00:09.835411 Host RAM: 8087MB total, 1811MB available
00:00:14.688622 RamSize <integer> = 0x0000000080000000 (2 147 483 648, 2 048 MB)

you have less than 2GBs available but you have the guest assigned 2GB.

You have all 4 cores assigned to the guest which leaves none for the host…

00:00:14.688619 NumCPUs <integer> = 0x0000000000000004 (4)

There may be other problems but those were obvious.

I'm not sure what is using so much memory on your host but normally you want to assign 50% of the available memory to the guest and half the physical cores. Two in your case.

Just to give you an idea and why I wonder what is running on your host, this is from my Xubuntu log...

00:00:02.759096 Host RAM: 8094MB total, 5712MB available

As you see I also have 8GB of RAM but a large difference in available RAM.

loukingjr wrote:There are a number of problems…

00:00:09.835411 Host RAM: 8087MB total, 1811MB available
00:00:14.688622 RamSize <integer> = 0x0000000080000000 (2 147 483 648, 2 048 MB)

you have less than 2GBs available but you have the guest assigned 2GB.

You have all 4 cores assigned to the guest which leaves none for the host…

00:00:14.688619 NumCPUs <integer> = 0x0000000000000004 (4)

There may be other problems but those were obvious.

I'm not sure what is using so much memory on your host but normally you want to assign 50% of the available memory to the guest and half the physical cores. Two in your case.

Just to give you an idea and why I wonder what is running on your host, this is from my Xubuntu log...

00:00:02.759096 Host RAM: 8094MB total, 5712MB available

As you see I also have 8GB of RAM but a large difference in available RAM.

Dear loukingjr,

Should I upgrade my physical memory from 8 GB to 16 GB so that I have more RAM for my computer? I have 8 DDR4 memory slots on my motherboard which can support up to a maximum of 128 GB physical memory.

As for my microprocessor, I have SIX cores, not Quad-core. I am using the Intel 5th Generation Core i7 5820K processor (15MB L3 Cache, 3.3 GHz, 6 Cores, 12 Threads, Thermal Design Power 140 Watts, Haswell-E Architecture).

Thank you very much.

Yours sincerely,

Mr. Teo En Ming (Zhang Enming)
Singapore Citizen
2nd October 2015 Friday 11:33 AM Singapore Time

Teo En Ming wrote:Should I upgrade my physical memory from 8 GB to 16 GB so that I have more RAM for my computer? I have 8 DDR4 memory slots on my motherboard which can support up to a maximum of 128 GB physical memory.

As for my microprocessor, I have SIX cores, not Quad-core. I am using the Intel 5th Generation Core i7 5820K processor (15MB L3 Cache, 3.3 GHz, 6 Cores, 12 Threads, Thermal Design Power 140 Watts, Haswell-E Architecture).

The first thing I would want to do is see what software is using up so much memory on the host. Adding memory is always a good thing however and increasing it to 16GB would help.

I never looked up your CPU and just assumed it was a 4core i7. I would still stick with 2 cores for a guest or at the most 3.