I am running PVE 7.4-4. I have a mix of containers and VMS. If I counted right, they are all using 43 GB. I have 64 GB installed. The summary for the device shows it is using 60 GB. I understand there would be some for the Proxmox OS, but how much does it really use, alone? Where is the remaining 21 GB being used?
Where's the rest of my RAM going?
- Thread starter droidus
- Start date
What is the output of
If you use ZFS, what is the output of
free -g (in code tags please) on the Proxmox host?If you use ZFS, what is the output of
arc_summary | grep size?
Code:
total used free shared buff/cache available
Mem: 62 59 2 0 1 2
Swap: 0 0 0
Code:
root@home:/var/log# fdisk -l | grep -i zfs
Partition 1 does not start on physical sector boundary.
/dev/sdb3 1050624 5860533134 5859482511 2.7T Solaris /usr & Apple ZFS
/dev/sda3 1050624 5860533134 5859482511 2.7T Solaris /usr & Apple ZFS
Partition 1 does not start on physical sector boundary.
Partition 2 does not start on physical sector boundary.
/dev/zd112p2 1064 104825895 104824832 50G FreeBSD ZFSHere's the output from the command you requested:
Code:
ARC size (current): 98.3 % 30.8 GiB
Target size (adaptive): 98.2 % 30.8 GiB
Min size (hard limit): 6.2 % 2.0 GiB
Max size (high water): 16:1 31.4 GiB
Most Frequently Used (MFU) cache size: 74.5 % 20.9 GiB
Most Recently Used (MRU) cache size: 25.5 % 7.1 GiB
Metadata cache size (hard limit): 75.0 % 23.5 GiB
Metadata cache size (current): 29.6 % 7.0 GiB
Dnode cache size (hard limit): 10.0 % 2.4 GiB
Dnode cache size (current): 40.2 % 967.4 MiB
spl_kmem_cache_magazine_size 0
spl_kmem_cache_max_size 32
l2arc_rebuild_blocks_min_l2size 1073741824
spa_asize_inflation 24
zfs_abd_scatter_min_size 1536
zfs_arc_average_blocksize 8192
zfs_dbgmsg_maxsize 4194304
zfs_initialize_chunk_size 1048576
zfs_max_nvlist_src_size 0
zfs_max_recordsize 1048576
zfs_metaslab_max_size_cache_sec 3600
zfs_object_mutex_size 64
zfs_override_estimate_recordsize 0
zfs_recv_write_batch_size 1048576
zfs_vdev_cache_size 0
zfs_vnops_read_chunk_size 1048576
zil_maxblocksize 131072Up to 32GiB is used by ZFS (currently 30.8), which might explain where your memory is going. You can limit this by following the Proxmox manual, or one of the many threads about this on this forum. Personally, I think memory used as cache is better than unused memory.
The RAM you provisioned to your VMs (not containers) are not the only ram that is used. Each VM has also a graphics card which uses RAM, disk drivers, network drivers and so on. All of that needs RAM too, so your per VM ram usage is actually higher.