Prabhakar Jonnalagadda, a performance architect at Oracle, tackled an application's frequent crashes and poor performance by analyzing its GC log with GCeasy and optimizing JVM arguments. He emphasizes that tuning options are case-specific and encourages engineers to explore and adapt solutions, as there is no universal fix for performance issues.
The ADDO conference, a major online DevOps community, featured architect Ram Lakshmanan in 2022 discussing wasteful enterprise spending on garbage collection. He emphasized that millions are squandered, yet optimization can improve customer experience and save costs. His talk urges a reevaluation of current garbage collection practices to enhance efficiency.
JAX London is an annual conference for Java and Software Architecture enthusiasts, taking place every October. In 2022, architect Ram Lakshmanan discussed the significant financial waste enterprises incur from ineffective garbage collection, emphasizing the importance of optimization for cost savings and enhanced customer experience.
The post outlines the regions of JVM memory, focusing on the Metaspace, which contains class metadata. It offers five methods to inspect loaded classes: using verbose flags for versions 8 and 9+, invoking jcmd, a programmatic approach, and performing Heap Dump analysis. Each method is described for practical usage.
The java.lang.String#intern() method can significantly reduce memory usage by eliminating duplicate strings in Java applications. A comparison of two programs—one utilizing intern() and the other not—demonstrated that the intern() method reduced memory consumption from 1.08GB to 38.37MB at the cost of increased response time.
The intern() function in Java's String class optimizes memory usage by managing a pool of string objects in the JVM. When invoked, it checks for existing strings, reusing them if present to eliminate duplicates. While beneficial for memory efficiency, using intern() can negatively impact application response time compared to other methods like string deduplication.
The intern() function in Java's String class helps eliminate duplicate string objects, reducing memory usage by storing interned strings in the JVM's heap region. This post includes practical examples, performance observations from a sample program, and highlights the significance of enabling garbage collection logging for memory management insights.
This post compares the performance of HashMap, Hashtable, and ConcurrentHashMap through practical examples. It recommends ConcurrentHashMap for its thread-safe implementation, despite being marginally slower than HashMap. Testing showed HashMap performed best, but was not thread-safe, while Hashtable was significantly slower due to its synchronization constraints.
This post discusses the advantages of setting the initial heap size equal to the maximum heap size for Java applications running on JVM. It highlights benefits like improved application availability, enhanced performance, reduced startup time, and unchanged computing costs. The article argues that this practice is particularly beneficial for enterprise applications.