VNC hangs

[kefear]

Hello,
Just recently I have noticed that VNC console of KVM-based virtual machine hangs from time to time. Then You can only reboot the machine to be able to vnc to it again. I have tried different browsers and it happens for all of them (Chrome, Firefox, IE8). I've been trying to setup guacamole to be able to vnc to my virtual machines via https but I can't make any progress without resolving this issue. Is there any way I can overcome this one ? Maybe some piece of configuration for the VM or for the 'vnxproxy via nc' thing ?
Big thanks in advance

 

[JustaGuy]

What's the output of:

#pveperf

And check the log for a clue...

#nano /var/log/syslog

Do you have I/O intensive processes running elsewhere on the host?
You can check this with iotop:

#aptitude update
#aptitude install iotop
#iotop -o

 

[kefear]

I don't believe it's related to performance . There must be something with encoding maybe...


pveperf
CPU BOGOMIPS: 39991.05
REGEX/SECOND: 676341
HD SIZE: 9.61 GB (/dev/mapper/222d7000155c26531-part1)
BUFFERED READS: 143.36 MB/sec
AVERAGE SEEK TIME: 3.71 ms
FSYNCS/SECOND: 530.86
DNS EXT: 44.20 ms

 

[JustaGuy]

The only time I recall experiencing any kind of hanging on mine was when there was alot going on with NFS storage volumes, simultaneous backups & restores with KVMs running hard- things of that nature.

No problems like that lately with the new PVE, although nothing's running hard yet.

That's all that comes to mind, sorry to hear it's not something simple like that.