java performance tuning tips

SQL Server Performance Tuning entry (graphic version) Step 1: capture sample data during business peaks(About 2 hours ). The tool used is the profiler that comes with sqlserver, also known as the event probe. For example, after entering, click the button on the leftmost side to create a new trail: DBO permission is required for logon, therefore, you can log on with SA or use Windows integrated verification

Tags: bottleneck affects LAN connectivity and so on addition query framework staticReprinted from Http://www.cnblogs.com/jiaosq/p/5843437.html Today, database operations are increasingly becoming a performance bottleneck for the entire application, which is especially noticeable for web applications. It's not just about the performance of the database that DBAs need to worry about, it's something that our p

);} /// ///generate time information from the GUID returned by SQL SERVER/// /// comb that contain time information/// Time Public Staticdatetime getdatefromcomb (System.Guid Guid) {datetime basedate=NewDateTime (1900,1,1); byte[] Daysarray =New byte[4]; byte[] Msecsarray =New byte[4]; byte[] Guidarray =GUID. Tobytearray (); //Copy The date parts of the GUID to the respective byte arrays.Array.copy (Guidarray, Guidarray.length-6, Daysarray,2,2); Array.copy (Guidarray, Guidarray.length-4, Ms

on static file compression />2. Optimizing the JVM for catalina.shOpen the Tomcat path \bin\ catalina.sh, add at the top, red part please adjust according to the actual situationJava_opts= "-server-showversion-xms12g-xmx12g-xx:permsize=256m-xx:maxpermsize=256m "java_opts= "$JAVA _opts-d64-xx:cicompilercount=8-xx:+usecompressedoops"java_opts= "$JAVA _opts-xx:survivorratio=4-xx:targetsurvivorratio=90"java_op

This article introduces 10 MySQL Performance tuning methods. each method is very detailed and practical. For more information, see MYSQL, which is the most popular WEB backend database. WEB development languages have developed rapidly recently. PHP, Ruby, Python, and Java have their own characteristics. although NOSQL has been mentioned more recently, I believe m

= 0.0049876712328767sSecond: Average loading time for each class, 34.498/9484 = 0.0036374947279629sAs you can see, there are some performance improvements in how muchGiven that eclipse is running for a long time, the other possible adjustments are as follows:(1) Close System.GC ()(2) Improved JIT compilation of some code in eclipse(3) Optimize the garbage collector to reduce the time that garbage collection causes the application not to respondfor (1

distributed operations where the FastCGI program can execute and accept requests from other Web servers on hosts other than the Web server.FastCGI is a language-independent, extensible architecture for CGI open extensions whose main behavior is to keep the CGI interpreter process in memory and thus achieve high performance. We know that the repeated loading of the CGI interpreter is the main reason for the poor CGI

unstable in earlier versions of Spark, and Spark does not want to break version compatibility, so Kryoserializer is not configured as the default, but Kryoserializer Should be the first choice under any circumstances.The frequency with which your record is switched in these two forms has a significant impact on the operational efficiency of the Spark application. Check out the types of data passing around, and it's worth trying to see if you can squeeze a little water.Excessive deserialization

xf master# cd major-mysqltuner-perl-993bc18/#./ mysqltuner.pl You will receive detailed reports and recommended tips for MySQL usage. The following is an example of the output from the default MariaDB installation: MySQL Performance Optimization 15. Optimize and Repair MySQL database Sometimes tables in the MYSQL/MARIADB database can easily crash, especially if the server shuts down unexpectedly, the fil

PHP is a scripting language executed on the server side that has developed many of the world's best-known websites, including Yahoo and Facebook. Here are 6 PHP code, performance tuning tips. 1. Upgrade PHP to the latest version The easiest way to improve performance is to constantly upgrade and update the PHP versio

performance analysis and tuning. Background knowledge Main methods of performance analysis Monitoring: Monitoring is a common way to view the run-time behavior of an application. There are often multiple views (view) that display CPU usage, memory usage, thread state, and other useful information in real time, so that users can quickly discover the key to the

Course Lecturer: David Course Category: other Suitable for people: Beginner Number of lessons:9 hours Update level: complete Use the technology: Java, Drools Projects involved: Drools Rule Workflow Engine Contact information:Need more information to contact Q2748165793I. Background of the courseWhat is 1.1 drools?A rule engine is a component embedded in an application that separates business decisions from application code