{"description":"This feature allows you to monitor metrics calculated by an expression. This feature is only available with a paid plan or during a Trial period. Also, it is currently an experimental feature. Expression monitoring specifications Metrics from two minutes prior to the current time will be monitored. \u2026","provider_url":"https://hatena.blog","author_name":"andyyk","provider_name":"Hatena Blog","height":"190","width":"100%","categories":[],"author_url":"https://blog.hatena.ne.jp/andyyk/","title":"Expression Monitoring","blog_url":"https://mackerel.io/docs/","url":"https://mackerel.io/docs/entry/expression-monitoring","image_url":"http://cdn.mogile.archive.st-hatena.com/v1/image/murata_s/302446800847032711.png","blog_title":"Mackerel Docs","type":"rich","version":"1.0","published":"2016-08-01 17:01:45","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmackerel.io%2Fdocs%2Fentry%2Fexpression-monitoring\" title=\"Expression Monitoring - Mackerel Docs\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}