On 06/14/2012 04:59 PM, Mark Wu wrote:

Hi guys

I got the following error message when I tried to run a VM:

"VM's swap percentage is above the threshold. (check your configuration parameters for Host Swap Percentage)."

After increasing the parameter BlockMigrationOnSwapUsagePercentage, the problem disappeared.

But I don't understand the logic here: IsVMSwapValueLegal .... return ((swap_total - swap_free - mem_available) * 100 /

analyzing this... how much memory swap has minus how much is still available gives the amount of swap used then subtract the amount of RAM available - since it won't require swap for that amount of RAM. that's gives how much swap is used (taking into consideration available RAM) as a percentage from physical memory yes, could be written in a more readable way.

physical_mem_mb) <= Config .<Integer> GetValue(ConfigValues.BlockMigrationOnSwapUsagePercentage);

So anyone can help me explain it? Thanks a lot!

Mark.

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