performance profiling tools

swpd freeFrom the above data you can see the points: Context Switch (CS) is much higher than interrupts (in), which means the kernel has to switch processes back and forth; Further observation shows that system time (SY) is very high and user time (US) is low, plus a high-frequency context switch (CS), indicating that a large number of system calls are being invoked by the running application; Run Queue (R) is above 14 threads, according to the hardware configuration of thi

Five debugging tools to improve Java development performance Java is a very powerful programming language and has been widely used since its publication. As the core language of Android, a very popular mobile platform, it has greatly promoted the development of the mobile communication industry. Therefore, it is certain that the demand for Java developers will also increase as the Android platform continue

Overview When the system bugs need to locate the problem, knowledge, experience is the key foundation, the data is the basis, the tool is the use of knowledge processing data means. The data mentioned here include: Run log, exception stack, GC log, thread snapshot (threaddump/javacore file), heap dump Snapshot (heapdump/hprof file), etc. Using the appropriate virtual machine monitoring and analysis tools can accelerate our ability to analyze data and

Label:MySQL several performance testing tools to use Recently due to compare MySQL and its branches mariadb, Percona performance, understand a few of these tools, including: Mysqlslap Sysbench Tpcc-mysql, do a collation, memo, share 1, MysqlslapInstallation: Simple, with MySQL on it. Function: Simulates concurrent test

AWR (Automatic Workload Repository) is a new tool provided by Oracle 10 Gb to collect database statistics. It mainly includes the AWR memory area, historical data storage files, ASH and other components. The main content of the AWR report includes the following parts: Preface:This is the first section of the AWR report, which describes the environment, including the database name, database version, whether it is a RAC node, and the collection time of the snapshot report. Summary:Including the wa

change curves in the process to understand the execution efficiency.Also, the Windows Task Manager cannot detect memory leaks, and we need to use other tools.For more information, please pay attention to the first Cocos2d-x 3.2 Edition book "Cocos2d-x: C + + volume" book Exchange Discussion website: http://www.cocoagame.netFor more exciting video courses, please follow the Cocos class: Http://v.51work6.com Welcome to join the COCOS2D-X Technical Discussion group: 257760386 Welcome to the Luxgen

[Original] Google Page speed, one of the powerful tools for website performance optimization" Http://code.google.com/intl/zh-CN/speed/page-speed/ What is page speed?Page speed is an open-source Firefox/firebug add-on. webmasters and web developers can use page speed to evaluate the performance of their web pages and to get suggestions

Mysqlslap is MySQL's own benchmark tool, the advantages: query data, simple syntax, flexible and easy to use. The tool can simulate multiple clients concurrently issuing query updates to the server. The performance test data is given and the performance comparison of various engines is provided. MSQLSLAP provides an intuitive verification basis before and after MySQL pe