The file which is required to get the CPU usage is /proc/stat. Instead of going into procfs I will redirect you to wikipedia. There is no disk inodes and thus storage related to the files. No files in procfs exists actually in the disk. The proc filesystem or the Procfs is a special filesystem which gives you a view into the kernel data. As you might have expected this will simply access the CPU time information from /proc pseudo-filesystem and report the results. Once you have this set up, you can point Telegraf to your InfluxDB instances and start collecting and reporting on these metrics.Today I will post about how to monitor CPU usage by processor in Linux. They include whether to report per CPU stats or not, whether to report total system CPU stats or not, collect raw CPU time metrics, and then compute and report on the sum of all non-idle CPU states. How to monitor CPU performance using the CPU Telegraf PluginĬonfiguring the CPU Telegraf Plugin is simple as there are only a handful of configurations to set. Using Telegraf opens the door for lots of varied use cases. You can also easily add memory, disk and a whole host of other metrics with the various Telegraf plugins to help paint a complete picture of your environment's performance. The CPU Telegraf plugin gathers metrics on the system CPU that you can store in InfluxDB. Typically, when you are tracking metrics about CPU performance, you do this by collecting and reviewing memory and disk usage as well. Key metrics that can help uncover the issue behind the CPU being maxed will paint a picture of who is using the CPU (application, processes, or OS itself) which processes are demanding more cycles than the CPU can provide whether the CPU is waiting for operations to complete or whether it is doing no work at all.
CPU metrics in particular are helpful to determine if the CPU is constantly being maxed out. When trying to answer questions about what is impacting the performance of your servers or determining what VM size to choose, one of the first set of bottlenecks you check are memorey, disk, and CPU. CPU Performance Metrics Use This InfluxDB Integration for Free
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