--- title: "Karuppiah Natarajan (@karuppiah7890) | Hashnode" description: "Software Developer. Read the latest articles by Karuppiah Natarajan on Hashnode." url: "https://hashnode.com/@karuppiah7890" --- @karuppiah7890 # Karuppiah Natarajan @karuppiah7890 · Chennai, India · Joined September 2017 Software Developer [Website](https://karuppiah7890.github.io/blog/) ### [inodes](https://karuppiah.dev/inodes?utm_source=hashnode&utm_medium=feed) inodes is a concept in Linux. Oh wait…no Fun fact that I learned while experimenting on my macOS - I can see that the term and concept of inodes exists in the context of macOS too Looks like it’s a “Unix” thing and Linux and Darwin, both are Unix bas... 2 min read · [karuppiah.dev](https://karuppiah.dev/inodes?utm_source=hashnode&utm_medium=feed) [Jan 4](https://hashnode.com/posts/inodes/695a957e3c131365599c791c) ### [Kubernetes Preemption Event](https://karuppiah.dev/kubernetes-preemption-event?utm_source=hashnode&utm_medium=feed) You can look for Kubernetes Preemption Events in your observability system assuming you are exporting your Kubernetes Events to some store like some time series DB or similar In our case, we use Prometheus and we have an exporter for exporting the Ku... 1 min read · [karuppiah.dev](https://karuppiah.dev/kubernetes-preemption-event?utm_source=hashnode&utm_medium=feed) [Dec 24, 2025](https://hashnode.com/posts/kubernetes-preemption-event/694bca5422dff39d49873aad) ### [Speedscope: Performance Data Visualization](https://karuppiah.dev/speedscope-performance-data-visualization?utm_source=hashnode&utm_medium=feed) Recently, when I discovered the py-spy profiler took for Python, I also discovered Speedscope, which is visualization tool for visualizing performance data (performance profile etc). This is a flamegraph Visualization. I have something of this sort w... 1 min read · [karuppiah.dev](https://karuppiah.dev/speedscope-performance-data-visualization?utm_source=hashnode&utm_medium=feed) [Dec 19, 2025](https://hashnode.com/posts/speedscope-performance-data-visualization/6945a5d4a87290de2391b503) ### [Profilers!](https://karuppiah.dev/profilers?utm_source=hashnode&utm_medium=feed) So, today, we had an issue in one of our internal systems called API Tester. It was very slow. Only today it was slow, and the CPU usage was very high according to our monitoring systems, especially since today morning. Before noticing the CPU usage,... 4 min read · [karuppiah.dev](https://karuppiah.dev/profilers?utm_source=hashnode&utm_medium=feed) [Dec 18, 2025](https://hashnode.com/posts/profilers/69440654db16179356816667) ### [Kubernetes Features Enabled](https://karuppiah.dev/kubernetes-features-enabled?utm_source=hashnode&utm_medium=feed) If you have Prometheus running and scraping metrics - You can find Kubernetes list of features enabled information for every feature using kubernetes\_feature\_enabled metric which gives build information kubernetes\_feature\_enabled{} The name of the f... 1 min read · [karuppiah.dev](https://karuppiah.dev/kubernetes-features-enabled?utm_source=hashnode&utm_medium=feed) [Dec 18, 2025](https://hashnode.com/posts/kubernetes-features-enabled/6943a9d1e506a7f8e9f08d54)