XenServer 6.5, Insufficient free memory on compute node to start

asked 2015-10-01 08:15:02 -0600

Nereo gravatar image

updated 2015-10-01 11:24:26 -0600

smaffulli gravatar image

Hello, When I try to create an instance, I get the error log "Insufficient free memory on compute node to start", if I check the memory available on the hypervisor using nova command line or horizon, seems like there are enough memory, but if I check the memory on vCenter the hypervisor doesn't have enough memory. This makes me think OpenStack is not reading the correct amount of memory available on the hypervisor. is this a correct behavior? The only way to workaround is using

ram_allocation_ratio = 1.0 reserved_host_memory_mb = XXX

To reserve enough memory on the system.

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