cloudwatch combine two metrics

[chanvoyage]

hello guy , i would like to use boomtable but i can not combine two metric from Lambda Function like picture If there is any mistake, please suggest me Thank you very much

[yesoreyeram]

It seems you need space delimiter as per your metric name

[chanvoyage]

hello yesoreyeram

Could you tell me how to space delimiter. , i try to search everything but not found cloud watch exmaple

thank you very much