weblogic performance tuning

http://blog.csdn.net/innost/article/details/9008691Authorized by the author, published Tieto a young cow of a "programmer" masterpiece.Introduction to the Android System Performance tuning toolIn the software development process, presumably many readers have encountered the system performance problem. Several major steps to solve the system

Tune to the last, the more you feel the following 2 words quite sensible:"Based on our experience (as evidenced by many industry experts), 80% performance gains on SQL Server came from improvements in SQL coding, not from tuning for configuration or system performance. ”-Kevin Kline, Transact-SQL programming author"Experience shows that the

virtual memory management of Linux, if a memory page has been allocated, but has not been used for a period of time, Linux will move the memory page into swap space.You can often see daemons such as Getty, which are usually started when the system is started, but are rarely used. It seems more efficient to free up the precious main memory of the page and move it to the swap area. This is how Linux manages swap, so you don't need to panic when you find that the swap area is already using 50%. Th

Liferay The default is not to turn on tuning parameters, so run slower, we can open some parameters to achieve better performance: Today I did the following configuration: (1) The following parameters are configured in the $liferay_home/portal-ext.properties: Last.modified.check=false Theme.css.fast.load=true Javascript.fast.load=true (2) We've disable all the filters in the $liferay_home/ (3) We d

Most developers take for granted that performance optimization is complex and requires a lot of experience and knowledge. Well, you can't say it's completely wrong. Optimizing your application for optimal performance is not an easy task. But that doesn't mean that if you don't have the knowledge, you can't do anything. Here are 11 easy-to-follow recommendations and best practices to help you create a well-p

This article mainly tells you about the 20 frequently-encountered problems in DB2 Performance Tuning. If you are curious about the 20 frequently-encountered problems in DB2 performance tuning, the following articles will unveil its secrets. The following is a detailed description of the article. I hope you can learn fr

Today, we will focus on the comprehensive analysis of 12 difficult problems in DB2 performance tuning, if you are interested in the comprehensive analysis of the 12 Problem Problems in DB2 performance tuning, you can understand the following articles. The following is a detailed description of the main content of the a

Performance issues with Java EE applications are a very important issue for serious projects and products. In particular, enterprise-class applications, concurrent users, a large number of data transmission, business logic complex, occupy more system resources, so performance problems in enterprise-class applications become critical, it and the stability of the system has a direct link. More importantly, th

In addition to the integrated VISUALVM and Jconsole, the JDK itself provides performance tuning monitoring tools such as JPS, Jstack, Jmap, Jhat, and Jstat.In Java development, we sometimes encounter the following problems:OutOfMemoryError, Low memoryMemory leaksThread deadlockLock contention (lock contention)The Java process consumes too much CPU......These problems may be overlooked by many people in thei

Performance Tuning for mysql SQL statements Performance Tuning for mysql SQL statements In server development, there are sometimes requirements on the concurrency, and sometimes an SQL statement, such as a stored procedure, affects the speed. Now, if the execution of an SQL statement is slow during server code execu

database SELECT statement printed from the log of the program) after the SELECT statement Jmeter testresult No. Type Original Bigger 1 500Connection query/s CPU 100%150q/s 2 Connections 255q/s 160q/s160q/s The problem now is that the Tomcat request 160q/s no more tuning, Tomcat's memory configuration 4G actually used less than 1 G, CPU 8 core utiliza

your system battery or flash drive on your mobile device. One benefit of using ramlog is that, there is no need to worry that a daemon sends a message to syslog every 30 seconds. In the past, the hard disk must be running at any time, which is not good for hard disks and batteries.19. Package and writeA fixed size of space is allocated in the memory to store log files, which means that the hard drive of the laptop does not need to keep running, and only runs when a daemon needs to write logs, n

indicates how many new connection requests are allowed to wait in the queue when all threads are used to process requests. When the queue is full, any new request will be rejected. The default value is 100.The configuration example is as follows: Maxthreads is the maximum number of threads started by Tomcat. The default value is 200. acceptcount is the number of requests queued when the number of threads started by Tomcat reaches the maximum. The default value is 100, the two values work toget