Opened 3 months ago
Last modified 3 months ago
#22102 new defect
If a guest OS is assigned more than 32 GB of RAM, it uses disk
| Reported by: | f00dl3 | Owned by: | |
|---|---|---|---|
| Component: | VM control | Version: | VirtualBox-7.0.18 |
| Keywords: | RAM | Cc: | |
| Guest type: | Linux | Host type: | Linux |
Description
When a guest OS is assigned greater than 32 GB of RAM, it appears to thrash the disk maxing out the IO reads (502 MB/sec on a SSD.)
You can reproduce this bug by assigning 64 GB of RAM on a system with 128 GB of RAM. Once the RAM use inside the VM breaks 32 GB, it starts showing excessive disk reads/writes on iotop, which makes the virtual machine completely inaccessible and unresponsive, and OOM killer kills all processes active on the VM while this thrashing is occurring.


Please delete this. Found out the underlying cause was using too much memory, writing infinite files to memory without cleanup.