Hello,
I am facing memory exhaustion with two out of three Proxmox nodes in the same HA cluster.
I did a lot of searching, but failed to find my exact situation, so below I extracted the info asked in the other similar cases.
To rule out the first suspect, I am not using ZFS.
And the summary page is as follows:
Here is the second node affected:
And this is the status page from the not-affected node:
There are very few things that are running on this cluster:
Total memory usage of all VMs is barely 8 GB on all nodes combined.
Please help me identify what causes memory leaks.
I am facing memory exhaustion with two out of three Proxmox nodes in the same HA cluster.
I did a lot of searching, but failed to find my exact situation, so below I extracted the info asked in the other similar cases.
To rule out the first suspect, I am not using ZFS.
arcstat shows:
Bash:
root@ovh-px-01:~# arcstat
time read ddread ddh% dmread dmh% pread ph% size c avail
16:27:44 0 0 0 0 0 0 0 2.8K 2.0G -1.2Garc_summary -s arc shows:
Bash:
root@ovh-px-01:~# arc_summary -s arc
------------------------------------------------------------------------
ZFS Subsystem Report Wed Sep 03 16:32:01 2025
Linux 6.14.11-1-pve 2.3.4-pve1
Machine: ovh-px-01 (x86_64) 2.3.4-pve1
ARC status:
Total memory size: 62.4 GiB
Min target size: 3.1 % 2.0 GiB
Max target size: 19.2 % 12.0 GiB
Target size (adaptive): < 0.1 % 2.0 GiB
Current size: < 0.1 % 2.8 KiB
Free memory size: 860.2 MiB
Available memory size: -1441892224 Bytes
ARC structural breakdown (current size): 2.8 KiB
Compressed size: 0.0 % 0 Bytes
Overhead size: 0.0 % 0 Bytes
Bonus size: 0.0 % 0 Bytes
Dnode size: 0.0 % 0 Bytes
Dbuf size: 0.0 % 0 Bytes
Header size: 100.0 % 2.8 KiB
L2 header size: 0.0 % 0 Bytes
ABD chunk waste size: 0.0 % 0 Bytes
ARC types breakdown (compressed + overhead): 0 Bytes
Data size: n/a 0 Bytes
Metadata size: n/a 0 Bytes
ARC states breakdown (compressed + overhead): 0 Bytes
Anonymous data size: n/a 0 Bytes
Anonymous metadata size: n/a 0 Bytes
MFU data target: 37.5 % 0 Bytes
MFU data size: n/a 0 Bytes
MFU evictable data size: n/a 0 Bytes
MFU ghost data size: 0 Bytes
MFU metadata target: 12.5 % 0 Bytes
MFU metadata size: n/a 0 Bytes
MFU evictable metadata size: n/a 0 Bytes
MFU ghost metadata size: 0 Bytes
MRU data target: 37.5 % 0 Bytes
MRU data size: n/a 0 Bytes
MRU evictable data size: n/a 0 Bytes
MRU ghost data size: 0 Bytes
MRU metadata target: 12.5 % 0 Bytes
MRU metadata size: n/a 0 Bytes
MRU evictable metadata size: n/a 0 Bytes
MRU ghost metadata size: 0 Bytes
Uncached data size: n/a 0 Bytes
Uncached metadata size: n/a 0 Bytes
ARC hash breakdown:
Elements: 0
Collisions: 0
Chain max: 0
Chains: 0
ARC misc:
Uncompressed size: n/a 0 Bytes
Memory throttles: 0
Memory direct reclaims: 0
Memory indirect reclaims: 0
Deleted: 0
Mutex misses: 0
Eviction skips: 0
Eviction skips due to L2 writes: 0
L2 cached evictions: 0 Bytes
L2 eligible evictions: 0 Bytes
L2 eligible MFU evictions: n/a 0 Bytes
L2 eligible MRU evictions: n/a 0 Bytes
L2 ineligible evictions: 0 Bytesfree -h shows:
Bash:
root@ovh-px-01:~# free -h
total used free shared buff/cache available
Mem: 62Gi 61Gi 789Mi 44Mi 534Mi 652Mi
Swap: 2.0Gi 2.0Gi 1.5Mitop -co%MEM shows: And the summary page is as follows:
Here is the second node affected:
And this is the status page from the not-affected node:
echo 1 > /proc/sys/vm/drop_caches does virtually nothing.There are very few things that are running on this cluster:
Total memory usage of all VMs is barely 8 GB on all nodes combined.
Please help me identify what causes memory leaks.
Last edited:
