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Ram Lakshmanan

Ram Lakshmanan
Every single day, millions & millions of people in North America—bank, travel, and commerce—use the applications that Ram Lakshmanan has architected. Ram is an acclaimed speaker in major conferences on scalability, availability, and performance topics. Recently, he has founded a startup, which specializes in troubleshooting performance problems.

All Posts by this author

Simulate, diagnose, and solve

Chaos Engineering – Stackoverflow Error

This article is part of a tutorial series by Ram Lakshmanan, in which you will learn how to simulate various performance problems. You will learn how to simulate a StackOverflow error, find out how to diagnose it, and most importantly, how to solve the problem.

For Linux and Windows

Quickly find your Java application process ID

For certain monitoring tools like yCrash, you need to pass your application process ID as input. In this article, Ram Lakshmanan will guide you through how to find your Java application process ID in both Linux/Unix and Windows operating systems – simply follow these steps.

How do you kill the ZOMBIE process?

What are the process states in Unix/Linux?

In this article, learn about the following process states in Unix/Linux: RUNNING & RUNNABLE, INTERRRUPTABLE_SLEEP, UNINTERRRUPTABLE_SLEEP, STOPPED, and ZOMBIE. Find out how to find them, how to kill the SLEEPING process, the ZOMBIE process, and more.

Simulate and solve

Buggy App – Simulate performance problems

Using the simple Java application Buggy App, you can simulate various performance problems in your environment. This article will examine some use cases, how to download the application, and what common performance problems you can simulate through Buggy App.

Adaptive garbage collection

Simple & effective G1 GC tuning tips

In this article, Ram Lakshmanan shares a few tips to tune G1 Garbage collector to obtain optimal performance that are simple, yet effective. Tune your application to get optimal performance with these tips, methods, and explanations. G1 has been the default GC algorithm since Java 9.

Troubleshooting and resolution

Troubleshooting CPU spike in a major trading application

This article by Ram Lakshmanan examines an example of how to troubleshoot a CPU spike within a major trading application in North America. See what was causing the issue, how it was fixed, and what lessons you can take away.

Lucky number 7

7 JVM arguments of highly effective applications

There are way too many JVM arguments for anyone to digest and comprehend. The grand total might easily be more than 1,000 JVM arguments! In this article, we are highlighting seven important JVM arguments that you may find useful and what their positive impacts are.

Configuring with Ubuntu 16.04

How to install and configure Apache2

In just a few easy steps, this article covers how to install and configure Apache2 web server in Ubuntu 16.04. Simply follow along with these seven steps and plug in your own domain name into website1-example.com and get started.

Troubleshooting an unresponsive app

Log4j Bug – Slows down your app

When troubleshooting a popular SaaS application running on the Azure cloud, slow-down kept occurring intermittently with no noticeable pattern. This article uncovers the findings after troubleshooting and capturing the thread dump with jstack, so that you too will know what to do with an unresponsive application.

Simplifying heap dump analysis

How is HeapHero different?

Ram Lakshmanan explains how HeapHero differs from other heap dump analysis tools and how your entire organization can easily utilize its features. HeapDump helps analyze large size heap dumps, can be run on the cloud, offers sharing features for team collaboration, and has several more unique capabilities not found in other tools.

Taking a look at the JVM tool

Jstat – Analysis

What are the uses of jstat and what are its limitations? It is a Java virtual machine tool for monitoring statistics and captures metrics when the JVM is running without any pre-requisite instrumentation. In this article, find out how to launch jstat, what the data it generates means, and what tool you can use to analyze this data.

Analyzing memory wastage and duplicate strings

Memory wasted by Spring Boot PetClinic application

How much memory are you wasting with duplicate strings? In this article, Ram Lakshmanan goes through a Spring Boot PetClinic application and notes how much memory it wastes. If you can reduce the number of objects that are created to service new incoming requests, your response time will get a lot better.

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