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MySQL performance tuning primer script is a simple and easy-to-use mysql optimization tool. In fact, it is a shell script. Download: $ Wget http://www.day32.com/MySQL/tuning-primer.sh Run $ Sh tuning-primer.sh all After running the command, you will be asked about the mysql user name, password, and preferably mysq
Basically, the main considerations for Hibernate performance tuning are as follows:? database Design Tuning? HQL optimization? Proper use of APIs (e.g., different collections and query APIs based on different business types)? Main configuration parameters (log, query cache, fetch_size, batch_size, etc.)Map file optimization (ID generation policy, Level two cache,
Oracle Performance tuning is a broader and somewhat more complex topic, and the biggest problem for ordinary DBAs is where to start and what to do. All the information you know may be someone (a user) who reports a problem with the performance degradation of an application or query, and where do you start when faced with such a problem? Oracle's
Reference | reference Manual | skills | performance | Chinese InnoDB Chinese reference Manual---Dog dog (heart sail) Translation 9 Performance tuning tips (performance tuning tips) 1. If Unix top or Windows Task Manager shows the service's CPU occupancy rate less than 70%, (
rendering. Set the shadow effect to add a shadow path. If the fillet effect is required when sliding, turn on rasterization. Actual combatThe demo of this article can be downloaded on my github and then experience the optimization process one step at a pace. But after all, the demo is deliberately set up an environment, I will be in my own copy of the simple book app to constantly optimize the actual combat, welcome to learn to communicate together.Resources: Draw pixel to
would recommend adjusting your index design to create an overlay index to ensure the stability of the plan. But forcing a specific execution plan is just a temporary fix-you still have to fix the root cause of your problem. Summary Don't get me wrong: query storage in SQL Server 2016 is a great feature that will help you understand planned regression more easily. It will also help you "temporarily" enforce a specific execution plan. But the goal of performa
We are going to discuss with you today that we will correctly resolve the 12 difficult questions about DB2 performance tuning. If you are curious about the 12 difficult questions about DB2 performance tuning, the following articles will unveil its secrets. The following is a detailed description of the article. I hope
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
not offline, because of the risk, so the system is more and more complex, not only maintenance difficulties, system performance is getting worse) system architecture and implementation of the performance impact: A Web application is naturally inseparable from the application (Web Applic ation) and Web application Server (Web server), Web server We control the tu
the "CPU" button to start a CPU profiling session, VisualVM will detect all applicationsThe method that is called. When entering a method, the thread issues a "method entry" event when exiting the methodA "Method Exit" event is also issued, and these events contain timestamps. Then VisualVM will put eachThe total execution time and number of invocations of the called method are displayed according to the run-time length.In addition, we can filter the analysis results by the method name filter b
The method of performance tuning for Linux operating system 2013-03-18 15:35 Honestqiao Chinaunixfont Size:T | T Linux is a free-to-use and free-to-propagate Unix-like operating system, with different Linux distributions and different kernels making changes to the parameters and settings, allowing the system to achieve better performance. This article shares sev
Because the official BookPerformanceTuning section does not index by configuration item, it cannot achieve quick query. So I re-organized the original text with the configuration item drive and added some of my own understandings. If there is any error, please correct me. Configuration Optimization zookeeper. session. timeout default value: 3 minutes (180000 ms) Description: RegionSe Because the Performance Tuning
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
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
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