How to sum fields value (mem used = user used + system used)

How to on line chart display memory usage. The acquisition of the back of the data memory is divided into user and system use, I think the combined display, but inside the metrics and did not provide several fields of polymerization method. There are other ways to solve it?

Thanks

You can create a scripted field to do this for you - https://www.elastic.co/guide/en/kibana/current/managing-fields.html#create-scripted-field

Thanks very much

When you get it working how you want please do share the result, it may help someone else too! :smiley:

I am very sorry, I forgot to post on how to solve the problem
Can refer to the following steps

1> Scripted fields tab sheet, click button 'Add Script Field'
2>name :input the unique name
Format: choice bytes
Script : doc['cpu.used'].value + doc['cpu.system'].value
3>click 'Create Field'

And then reference the field at the interface.

Thanks