Prometheus API issue

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Apr 20, 2021, 5:29:58 AM4/20/21

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Hi Team,

I am trying to get memory utilization metric data using API below:

http://ip_address:9090/api/v1/query?query=100*(1-(node_memory_MemFree_bytes{instance=" ip_address:9100"}+node_memory_Cached_bytes{instance=" ip_address:9100"}+node_memory_Buffers_bytes{instance=" ip_address:9100"})/node_memory_MemTotal_bytes{instance="ip_address:9100"})

But after running I am getting this error

{

"status": "error",

"errorType": "bad_data",

"error": "invalid parameter 'query': 1:66: parse error: unexpected identifier \"node_memory_Cached_bytes\""

}

Could you please help me on this issue ? How can I get data via API?

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