Memory Graphs lowest value is 1GB

[f0]

The Memory Graphs are displaying 1 GB as the minimum value , the raw data has lower values

"pmid":251659269,"name":"mem.util.cached","instances":[
{"instance":-1, "value":527016 }]},
{"pmid":251659265,"name":"mem.util.used","instances":[
{"instance":-1, "value":1340176 }]},
{"pmid":251659266,"name":"mem.util.free","instances":[
{"instance":-1, "value":702260 }]},
{"pmid":251659268,"name":"mem.util.bufmem","instances":[
{"instance":-1, "value":35536 }]},