vmware is freezing for 2 minutes

fcbman · 07-26-2017, 08:58 AM

Hi,
we have vmware with RH where every couple of weeks, then server is freezing for 2 minutes (the all vm is freezing).
we can see those messages:

echo 0 > /proc/sys/kernel/hung_task_timeout_secs

looking online, we found one solution to change the parameters

vm.dirty_background_ratio = 5
vm.dirty_ratio = 10

But those are already the values we have.

Can anyone advise how we can prevent this?

Thanks!

BW-userx · 07-26-2017, 10:02 AM

did you try changing the ratio - playing around with it to see if different results, I know they are servers and prob in service so that might limit you from experimenting on them with changing that ratio -- but its an idea.

fcbman · 07-26-2017, 10:15 AM

Yes. we changed those values but doesnt seem like there is a difference and the freeze is still seen.

BW-userx · 07-26-2017, 10:30 AM

server is freezing for 2 minutes (the all vm is freezing).:

server is running all of the VM's - need to find cause of lock up to the server -- too many processes all at once?

not enough CPU's to handle the demand of whenever this is when it happens = need to find out root cause of freeze to Server that then freezes VM's, or is it that all of the VM's are tasking the Server all at once to lock it up = posable time share issues / total CPU's?

voleg · 08-03-2017, 08:31 AM

Please check the power saving on ESX and turn it off.