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Check the I/O Delay, you may show Total Disk Read and Total Disk Write, if to high will cause server hang. Also check CPU and Server load for a month (set Proxmox chart to "month maximum").

- How often the server hang? Every certain of time? - When Server hang, can you see the Monitor? Usually Monitor display the last error - In my experience, such error can only fix by replaced with another server. Because h/w test only test a h/w functional not h/w stabilization in certain period.

One of my LXC has very high TOTAL DISK READ, while Total Disk Write is normal. This LXC has 9 TB Total Disk Read while other VPS only several GB. How to know which process doing this high disk write? I'm using latest Proxmox 5.3-5.

never mind ... just use: select *

What is the command to extract /var/lib/pve-cluster/config.db to separate *.conf file?

In my Proxmox 5.2, a LXC with 1024 Swap. Change swap to 4096 then stop-start the LXC but swap still 1024: # free -m total used free shared buff/cache available Mem: 18000 1675 14261 12 2062 16324 Swap: 1022...

/mnt/data/images/6056/vm-6056-disk-1.raw: Unattached inode 21104135 /mnt/data/images/6056/vm-6056-disk-1.raw: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. (i.e., without -a or -p options) command 'fsck -a -l /mnt/data/images/6056/vm-6056-disk-1.raw' failed: exit code 4 Thanks very much...

One of my CT 6056 (350GB at sdb1) can not save file, after checking I see the CT 6056 hdd usage is 30% but sdb1 was 100%. So I shutdown CT 6056, then move some files from sdb1, now sbd1 has 32% free space. When I start CT 6056, error occures: Job for pve-container@6056.service failed because...

Nothing happen when use pct enter, as shown below: root@sds-002:~# pct start 656 root@sds-002:~# pct enter 656 Error: container '656' not running! root@sds-002:~#

When I click start on one of my LXC CT its show "Status Ok", but the CT still not started. Another CT on same server has no problem. # lxc-start -n 656 -F -l DEBUG -o /tmp/lxc-656.log See my attachment: lxc-656.log I have try to update to latest version then restart Server but still not help...

I hope Proxmox able to show IO Delay per VPS, so we can faster address which VPS caused big IO delay. I see Total Disk Read/Write has no related to IO Delay. Or is there any tool to see it now?

You will spent all day/week for fighting such infected CT. The best way is move your data/app then recreate CT, better use VM. After create VPS: install AV, Anti root kit and Firewall then restore again your data/app.

But LXC has no feature to limit disk Throughput and IOPS, right?

How to prevent this LXC eat all server resources? Since Server Load 400 all others LXC freeze. Basically this is not VPS used for :)

LXC by Proxmox not 100% same as regular LXC, Proxmox has added features like Firewall, User Access, User Group, etc which integrated using Proxmox UI. To make us simpler, Proxmox has wrap all complexity into "pct" tools. So, to make you regular LXC become Proxmox UI member, then simple backup...

Look at my post: https://forum.proxmox.com/threads/1-lxc-makes-server-load-400.45031/

Just backup then restore it to Proxmox.

I really don't understand how LXC works. I have only 10 LXC, CPU usage 20%, but 1 of my LXC has cpu usage 100% and caused Server Load 400! How to prevent this one LXC overloaded whole server? This overloaded LXC has Cores = 1, CPU Limit = 0, CPU Units = 1000

This new behavior is called thin-provisioning. You can see detail LVM using: # lvdisplay

Just testing on Centos 7 KVM, the mouse pointer very slow compare to Promox 4. Even text typing also slow. @tom : I suggest "noVNC setting button" displayed in the next version.