Memory Utilization

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tejasthakur123

Member
Oct 4, 2023
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Hello There,

lately, I have configured a 2 node proxmox cluster (Raspberry Pi as q device)
each node runs couple of lxc containers however the memory utilization on node 2 is drastically high.
any idea how to get and fix that high memory utilization

top command from node
1698274720585.png


1698274765200.png
 
Hi tejasthakur,

You could try sorting the processes in top by memory usage, by pressing the > or < key (the key will switch from sorting on one column to sorting on another column). You could install `htop` for an interface that is a bit friendlier (if you press > then, it will give you a list of columns you can sort by).

With only a screenshot it is very difficult for anyone to say more than you already know: "Yes, memory is used".

What is "q device" ? Which filesystem do you use? Are both nodes equal in hardware (same amount of RAM, same size/amount of storage)?
 
My guess would be you are using ZFS for replication? ZFS by default uses up to 50% of your hosts RAM for caching. So its normal that 50% of your RAM is in use even when not running a single guest. You could check thatwith arc_summary. According to top 4GB of those 8GB are using for caching. And that's a good thing. Free RAM is wasted RAM.
 
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wbk said:
Hi tejasthakur,

You could try sorting the processes in top by memory usage, by pressing the > or < key (the key will switch from sorting on one column to sorting on another column). You could install `htop` for an interface that is a bit friendlier (if you press > then, it will give you a list of columns you can sort by).

With only a screenshot it is very difficult for anyone to say more than you already know: "Yes, memory is used".

What is "q device" ? Which filesystem do you use? Are both nodes equal in hardware (same amount of RAM, same size/amount of storage)?
Click to expand...
Both the nodes are identical,

the q device is a quorum device which is helpful in case of failover
https://pve.proxmox.com/wiki/Raspberry_Pi_as_third_node
 
Dunuin said:
My guess would be you are using ZFS for replication? ZFS by default uses up to 50% of your hosts RAM for caching. So its normal that 50% of your RAM is in use even when not running a single guest. You could check thatwith arc_summary. According to top 4GB of those 8GB are using for caching. And that's a good thing. Free RAM is wasted RAM.
Click to expand...
Yes I recently configured the ZFS replication and the percentage is around 50%
my both host are with 16G RAM
 
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