We investigated the memory increase problem some time ago and learned a lot about JVM metrics. This happened again, we noticed several Java applications deployed in Kubernetes got the memory usage increasing gradually until it reached the memory limit, even after several times of increasing the memory limit, the usage can always hit above 90%, sometimes the container will be OOMKilled.

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Recently, I’m looking for efficient string manipulation in Golang, during the process of that, I used Golang benchmark to test the execution time and checked the Golang middle code to know the underlying mechanism between different solutions.

This article helps the software engineers who have Web development experience in other languages to migrate to Python Web development quickly, it contains several parts like basics, web development part, etc.

This article introduces some discovery of the Java memory usage in Kubernetes and how to set up a reasonable memory request/limit based on the Java heap requirement and the memory usage of the application.

This article introduces how to set up alerts for monitoring Kubernetes Pod restarts and more importantly, when the Pods are OOMKilled we can be notified.

This article explains how to use traffic control to simulate network chaos in Bare metal & Kubernetes, the network chaos can test the resilience of your service under a specified network condition such as packet loss, latency increase, etc.

You might have encountered some 5xx errors during http service rollout on Kubernetes and wonder how to make it more reliable without these errors, this article will first explain where this errors come from and how to fix them and implement zero downtime.

Prometheus is an opensource time series database, commonly used to gather and calculate monitoring metrics, this article explains how the query works with /query_range API.