Getting Started with Datadog
If your application exposes JMX metrics, a lightweight Java plugin named JMXFetch (only compatible with Java >= 1.7.) is called by the Datadog Agent to connect to the MBean Server and collect your application metrics. It also sends service checks that report on the status of your monitored instances. This plugin sends metrics to the Datadog Agent using the DogStatsD server running within the Agent
Monitoring Modern Infractructure（eBook provided by Datadog）を読んでみた #datadog | DevelopersIO
Chapter3: Alerting on What Matters 監視データを精査し収集出来ていると仮定して、それらから何をAlertすべきかに話は進んでいきます。 アラートが狼少年と化している担当者の方には是非一緒に見ていただきたい章となっています。 Automated alerts are essential to monitoring. They allow you to spot problems anywhere in your infrastructure, so that you can rapidly identify their causes and minimize service degradation and disruption. But alerts aren’t always as effective as they could be. In partic
iostat: (r/s + w/s) * svctm = %util on Linux
iostat -x is very useful to check disk i/o activities. Sometimes it is said that "check %util is less than 100%" or "check svctm is less than 50ms", but please do not fully trust these numbers. For example, the following two cases (DBT-2 load on MySQL) used same disks (two HDD disks, RAID1) and reached almost 100% util, but performance numbers were very different (no.2 was about twice as fast as n
iostat の見方 - ablog
出力例 $ iostat -x 30 avg-cpu: %user %nice %system %iowait %steal %idle 0.87 0.01 2.53 0.49 0.00 96.11 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.05 16.03 0.36 13.74 5.77 238.22 17.31 0.15 10.39 0.98 1.38 sda1 0.00 0.00 0.00 0.00 0.00 0.00 15.53 0.00 12.81 11.47 0.00 sda2 0.05 16.03 0.36 13.74 5.77 238.22 17.31 0.15 10.39 0.98 1.38 avg-cpu: %user %nice %syst
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How I Use iostat and vmstat for Performance Analysis - Yubin Xia
iostat await svctm の 見かた、考え方
GitHub - RichiH/OpenMetrics: Evolving Prometheus exposition format into a standard.
