[Engine-devel] What BlockMigrationOnSwapUsagePercentage

[Mark Wu]

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


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

Mark.