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AM using collectd to collect the metrics from the system, am using Influxdb as a database to collectd the metrics and Grafana for visualization. I need only the used RAM memory in percentage to display in grafana....

I need only the used memory value to show up in grafana exclusing the cached and buffered.

As of now i query grafana like 

 SELECT mean("value") *-1+100 FROM "memory_value" WHERE ("host" =~ /^$host$/ AND "type" = 'percent' AND "type_instance" = 'free') AND $timeFilter GROUP BY time($__interval),"host"

Which gives the wrong value.. Can anyone pls help me how to display the used RAM percentage

adiya joshi
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  • Why are you meaning the value? What's the expected value? Are you expecting cached memory to be counted as free? This question is fairly poorly written and has little research to show, I'd recommend reading [How do I ask a good question?](https://serverfault.com/help/how-to-ask). – Ginnungagap Sep 03 '19 at 19:44
  • @Ginnungagap I mean...I need only the used memory value to show up in grafana exclusing the cached and buffered... – adiya joshi Sep 04 '19 at 06:18
  • So you basically want the sum of all memory minus the used one? Instead of just the free memory? – Ginnungagap Sep 04 '19 at 06:20
  • @Ginnungagap can u help me to that pls... – adiya joshi Sep 04 '19 at 06:33
  • @Ginnungagap yes, i need free memory – adiya joshi Sep 04 '19 at 06:40

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