WMI:memory - Memory Utilization Trend

[motupaul]

Trying to pull the information of Total Memory allocated to the Windows server(VM) and Utilization. However when i search with the query

index=index_name source=WMI:memory host=server_name

I see below output, from this Available MBytes only. But my requirement is Total Memory allocated to the server and Utilization

20181023074026.175458
AvailableMBytes=27779
CommittedBytes=6207012864
FreeSystemPageTableEntries=16489566
PagesPersec=0
PercentCommittedBytesInUse=15
PoolNonpagedBytes=205963264
PoolPagedBytes=338452480
wmi_type=Memory

Could you please help me what would be way to get that,