jstat is a simple utility tool, that is present in JDK to provide JVM performance-related statistics like garbage collection, compilation activities. The major strength of jstat is its ability to capture these metrics dynamically when JVM is running without any pre-requisite instrumentation. What do we mean by it? Say for example if you want to capture garbage collection related statistics, you need to pass below arguments before you start the JVM:
Continue reading “jstat – Analysis”
W-JAX is a conference for modern Java and web development, for software architecture and innovative infrastructure with well-known experts from the industry. Renowned experts share their professional experiences in Sessions and Power Workshops.
Continue reading “Jax.de Munich – Troubleshooting real Production Problems”
All Day DevOps is the world’s largest online DevOps conference which is attended by 37,000 engineers all throughout the world. In this 2019 All Day DevOps Conference, our architect Ram Lakshmanan was invited to give the talk. Continue reading “All Day Devops – Troubleshooting Performance & Availability Problems”
W-JAX is a conference for modern Java and web development, for software architecture and innovative infrastructure with well-known experts from the industry. Continue reading “Jax.de Munich – GC tuning & troubleshooting crash course”
One of the widely wasted resources in the world today is: Memory. Due to inefficient programming, surprising (sometimes ‘shocking’) amount of memory is wasted. We see this pattern repeated in several enterprise applications. To prove this case, we conducted a small study. We analyzed the famous spring boot pet clinic application to see how much memory it is wasting. This application has been designed by the community to show how the spring application framework can be used to build simple but powerful database-oriented applications.
Continue reading “MEMORY WASTED BY SPRING BOOT APPLICATION”
Our architect Ram Lakshmanan presented a talk on the topic: “TROUBLESHOOTING REAL PRODUCTION PROBLEMS” in JAX London 2019 conference. Talk was very well received by the attendees.
Continue reading “TROUBLESHOOTING REAL PRODUCTION PROBLEMS”
Our architect Ram Lakshmanan presented a talk on the topic: “GC Tuning & Troubleshooting Crash Course” in JAX London 2019 conference. Talk was very well received by the attendees.
Continue reading “GC Tuning & Troubleshooting Crash Course”Coming soon…
Recently we experienced an interesting production problem. This application was running on multiple AWS EC2 instances behind Elastic Load Balancer. The application was running on GNU/Linux OS, Java 8, Tomcat 8 application server. All of sudden one of the application instances became unresponsive. All other application instances were handling the traffic properly. Whenever the HTTP request was sent to this application instance from the browser, we were getting following response to be printed on the browser.
Continue reading “TCP: out of memory — consider tuning tcp_mem”