Summary: The TOP command is very effective for finding CPU performance bottlenecks, but there are the following problems: Top must be the most CPU-intensive at the time, but not necessarily the cause of program
Thejvmstat 3.0home page documents the lightweight performance monitoring capabilities that are built into Java SE 6 and explains how to use these tools to monitor not only for the 6.0 HotSpot Java Virtual Machines but also HotSpot 1.5.0, 1.4.2 and 1.4.1 JVM's. 4.2 Java SE 6 Documentation ...
Enables performance optimization of an application on a machine with nonuniform memory architecture (NUMA) by increasing the application's use of lower latency memory. By default, this option is disabled and no optimization for NUMA is made. The option is only available when the parallel garbage ...
Java is often the backbone of many services, any malfunction of these applications has the potential to have catastrophic consequences. APM tools help engineers to prevent such events.
The Java HotSpot VM delivers optimal performance for Java applications, delivering advanced optimization, garbage collection, and thread synchronization capabilities. In addition, the VM offers debugging capabilities designed to improve overall reliability, availability and serviceability of Java technology-based...
1 Tools and Commands Reference 2 Main Tools to Create and Build Applications javac javap javadoc java jar jlink jmod jdeps jdeprscan 3 Language Shell 4 Security Tools and Commands 5 Remote Method Invocation (RMI) Tools and Commands 6 Java Deployment Tools and Commands 7 Monitoring Tools and Co...
after split is needed; the native split method or other tools have overloaded optimization methods, you can specify the limit parameter, and you can return in advance after the limit number is met; but In business code, use str.split(delim)[0] method, which is not the best performance. ...
This book assumes you already have some familiarity with Android application developmentbut want to go one step further and explore what can make your applications run faster. Although the Android tools and online documentation make it easy to create applications, performance optimization is sometimes ...
CPU usage, I/O latencies, and throughput of all parts of the system must be measured and analyzed; only then can it be determined which component is causing the performance bottleneck. There are a number of excellent resources on that subject, and those approaches and tools are not really ...
Performance optimization 性能优化 Persistence 持久化 Resource pooling 资源池 Synchronization 同步 Transactions 事务 三、Mybatis MyBatis 是支持普通 SQL查询,存储过程和高级映射的优秀持久层框架。MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射,...