kafka consumer performance tuning

(Program Optimization--nio operation improves performance 02 (for buffer operation))25th Lesson (Program Optimization--nio operation improves performance 03 (memory mapped))26th Lesson (four references in program Optimization--java 01))27th Lesson (Parallel Program Optimization-Concurrent Development design mode 01))28th Lesson (Parallel Program Optimization-design pattern for parallel development (Master-

Recently, due to Project Memory leakage, large-scale JVM performance tuning has been performed. , Now we will record the experience. I. JVM Memory Model and garbage collection Algorithm 1. According to the Java Virtual Machine specification, JVM divides the memory: New (young generation) Tenured (elder generation) Permanent generation (Perm) Among them, new and tenured are heap memory. The heap memory

Runnable because the subclass will have its own property creation that requires more overheadControl maximum concurrency: Use Java's executors class to control the thread pool maximum thread concurrency through Executors.newfixedthreadpool (nthreads).HTTP requests increase timeout, the database caches HTTP response, and the cache expiration time is determined based on the Cache-control domain in the HTTP cast message.frequently accessed, or once access consumes a large data cache.LayoutUse abst