Prabhakar Jonnalagadda is the performance architect in Oracle. He was presented with a performance problem of an application which had following symptoms: + Frequent unavailability of the application (crash issues) + Significant degraded performance in repeated spells In this post he talks about how he solved this application's performance problems. He basically analyzes the GC... Continue Reading →
ADDO conference is one of the largest online communities of DevOps professionals in the world. Every year they give the opportunity to learn from one another on a massive scale. In this 2022 year’s conference, our architect Ram Lakshmanan was invited to talk on the topic: “This Is Garbage Talk. Don’t Attend!”. In his speech,... Continue Reading →
All multi-threaded applications are prone to Deadlock. Modern Scala platform is no exception. In this series of simulating and troubleshooting performance problems in Scala, let’s discuss how to simulate a Deadlock in Scala and how you can troubleshoot it. What is Deadlock? First let's try to understand what 'Deadlock' means. Several technical definitions aren’t clear.... Continue Reading →
In this series of simulating and troubleshooting performance problems in Scala articles, let’s discuss how to simulate CPU consumption to spike up to 100% on a host (or container) and troubleshoot it. Scala sample program CPU consumption will spike up whenever a thread goes on an infinite loop. Here is a sample Scala program, which... Continue Reading →
In this series of simulating and troubleshooting performance problems in Scala, let’s discuss how to simulate the ‘java.lang.OutOfMemoryError: Java Heap space’ problem. ‘java.lang.OutOfMemoryError: Java Heap space’ will be thrown by the Scala application, when it generates more objects than the maximum configured heap size. Video: To see the visual walk-through of this post, click below: https://youtu.be/aoLHQsyCCyE... Continue Reading →
In this series of simulating and troubleshooting performance problems in Scala, let’s discuss how to make threads go into BLOCKED state. A thread will enter into a BLOCKED state when it couldn’t acquire a lock on an object because another thread already holds the lock on the same object and doesn’t release it. Video: To... Continue Reading →
In this series of simulating and troubleshooting performance problems in Scala, let’s discuss how to simulate thread leaks. ‘java.lang.OutOfMemoryError: unable to create new native thread’ will be thrown when more threads are created than the memory capacity of the device. When this error is thrown, it will disrupt the application’s availability. Video: To see the... Continue Reading →
In this series of simulating and troubleshooting performance problems in Scala, let’s discuss how to simulate StackOverflowError. StackOverflowError is a runtime error, which is thrown, when a thread's stack size exceeds its allocated memory limit. Video: To see the visual walk-through of this post, click below: https://youtu.be/PxfWuBEBcW8 Sample Program Here is a sample Scala program,... Continue Reading →
In this series of simulating and troubleshooting performance problems in Kotlin, let’s discuss how to simulate the ‘java.lang.OutOfMemoryError: Java Heap space’ problem. ‘java.lang.OutOfMemoryError: Java Heap space’ will be thrown by the application, when it generates more objects than the maximum configured heap size. Video: To see the visual walk-through of this post, click below: https://youtu.be/y9Iydjrnix8... Continue Reading →
In this series of simulating and troubleshooting performance problems in Kotlin, let’s discuss how to simulate StackOverflow errors. StackOverflow error is a runtime error, which is thrown when a thread's stack size exceeds its allocated memory limit. Video: To see the visual walk-through of this post, click below: https://youtu.be/dP-pPahkuLM Sample Program Here is a sample... Continue Reading →
