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Problem KVM and SWAP




Posted by Kurogane, 01-20-2013, 06:50 PM
Hello, I've problem with kvm/swap for some reason when i hit swap territory even if 1mb swap my IO wait or wa (top) hit to 90% and i'm unable to do anything, the vps is very slow unable to do anyting. I know swap is slow but this is ridiculous, i try with pc home to test swap and i dont getting this slowless as my kvm. The question is this normal or there is something not right? my HDD speed is 269.0 MB/s so not should be a problem and ioping not more that 0.3 ms DD ioping -c 10

Posted by net, 01-20-2013, 07:03 PM
Seems normal to me.

Posted by Kurogane, 01-21-2013, 11:33 AM
Then what is the point to have kvm swap if i can't use it?

Posted by NHRoel, 01-21-2013, 12:05 PM
You are not supposed to use swap. Swap is not backup ram. It is just an emergency backup in case system suddenly runs out of memory.



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