Memory leak

[Dexter82]

Hi all,

Was wonderign if anyone can help me troubleshoot why one of my VMs keeps maxxing out its ram consumption.

Upon restart everything works wonderful.

After a few hours I come back to find it with a massive spike and unable to recover. following a reboot again.

VM is Open media vault.iso

Config below.
agent: 1
boot: order=scsi0;ide2;net0
cores: 4
cpu: host
ide2: local:iso/openmediavault_7.0-32-amd64.iso,media=cdrom,size=936M
machine: q35
memory: 12288
meta: creation-qemu=8.1.2,ctime=1722340234
name: OMV
net0: virtio=BC:24:11:57:C9:03,bridge=vmbr0,firewall=1
numa: 0
onboot: 1
ostype: l26
scsi0: SSDstorage:vm-100-disk-0,iothread=1,size=50G
scsihw: virtio-scsi-single
smbios1: uuid=9dcca75b-9915-4e64-b550-de78321527ee
sockets: 1
virtio1: /dev/disk/by-id/wwn-0x50014ee2059374bc,size=1953514584K
virtio2: /dev/disk/by-id/wwn-0x50014ee206cc9f7b,size=1953514584K
virtio3: /dev/disk/by-id/wwn-0x50014ee20f056781,size=976762584K
virtio4: /dev/disk/by-id/wwn-0x50014ee20297535d,size=976762584K
virtio5: /dev/disk/by-id/wwn-0x50014ee25f927036,size=488386584K
vmgenid: 73344039-03be-4e7f-8939-4d56f28d6091

[PENDING]
agent: 0

 

[BobhWasatch]

File servers tend to use all of the RAM as cache. Is there an actual problem or you just don't like all the memory being in use?

ETA: Operating systems in general tend to use all of the RAM as cache. File servers just get there quicker.

 

[Dunuin]

And again: https://www.linuxatemyram.com

For Linux VMs, PVE webUI will show RAM used for caching as "used" and won't show "available" RAM as "free" RAM.

 

[Dexter82]

File servers tend to use all of the RAM as cache. Is there an actual problem or you just don't like all the memory being in use?

ETA: Operating systems in general tend to use all of the RAM as cache. File servers just get there quicker.

I dont beleive I am seeing any impact on system wide peformance. Was more a concern that it is spending unecessary resource that can be used from other containers and VMs

 

[Dexter82]

And again: https://www.linuxatemyram.com

For Linux VMs, PVE webUI will show RAM used for caching as "used" and won't show "available" RAM as "free" RAM.

If this is the case then sounds like there is no issue and regular behaviour. Thankyou.

 

[Dunuin]

I dont beleive I am seeing any impact on system wide peformance. Was more a concern that it is spending unecessary resource that can be used from other containers and VMs

Best way to not waste RAM is to not assign a VM more RAM than it needs. 4GB should be enough for OMV unless you use ZFS or similar. Otherwise it will eat all RAM you throw at it which then isn't available for other VMs which might benefit more from it.

 

[Dexter82]

And again: https://www.linuxatemyram.com

For Linux VMs, PVE webUI will show RAM used for caching as "used" and won't show "available" RAM as "free" RAM.

Love it thankyou sir

 

[Dexter82]

Best way to not waste RAM is to not assign a VM more RAM than it needs. 4GB should be enough for OMV unless you use ZFS or similar. Otherwise it will eat all RAM you throw at it which then isn't available for other VMs which might benefit more from it.

Excellent. I will do this.