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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....

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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  • you need to check which all fields you are collecting as part of RAM metric name `memory_value`, different types of fields can be `free` or `available_percentage` etc, note: this fields can be different based on which metric plugin you are using to collect it. – dkb Sep 03 '19 at 06:08
  • @dkb when i run free -m some values are showing up like free available etc...In that i need the total value of buffer+cache(used)/total ..HOw can i query this value in grafana... – adiya joshi Sep 03 '19 at 06:30
  • @dkb ValuesAbsolute true ValuesPercentage true this is what i gave in collectd.conf – adiya joshi Sep 03 '19 at 06:34

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