This article mainly introduces the detailed explanation of hibernate second-level cache in Java. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let's follow the editor to take a look at Hibernate's second-level cache 1. Cache overview Cache (Cache): a very common concept in the computer field. It is located between the application and the permanent data storage source (such as a file or database on the hard disk). Its function is to reduce the frequency of the application directly reading and writing the permanent data storage source, thereby improving the application's running performance. The data in the cache is a copy of the data in the data storage source. The physical medium of the cache is usually memory. Hibernate provides two levels of cache. The first level of cache is the Session level cache, which is a transaction-wide cache. This level of cache is managed by hibernate, and generally no intervention is required. The second level of cache is the SessionFactory level cache, which is a process-wide cache. Hibernate's cache can be divided into two categories: built-in cache: Hibernate's own cache , cannot be uninstalled. Usually in Hiber
1. What is the second level cache? Summary of usage of second-level cache instances
##Introduction: This article mainly introduces hibernate 2 in java The detailed explanation of level caching is very good, and I will share it with you now as a reference. Let's follow the editor to take a look at Hibernate's second-level cache 1. Cache overview Cache (Cache): a very common concept in the computer field. It is located between the application and the permanent data storage source (such as a file or database on the hard disk). Its function is to reduce the frequency of the application directly reading and writing the permanent data storage source, thereby improving the application's running performance. The data in the cache is a copy of the data in the data storage source...
2. Optimization example of MySQL stored procedure_MySQL
Introduction: In the process of writing MySQL stored procedures, we will need to optimize certain stored procedures from time to time. The purpose is to ensure the readability, correctness and running performance of the code. This article uses the author's actual work as the background to introduce the entire process of optimizing a certain MySQL stored procedure.
3. Using NGINX to maximize Python performance, Part 1: Web services and caching
Introduction:: Utilization NGINX Maximizes Python Performance, Part One: Web Services and Caching: [Editor's Note] This article mainly introduces the main functions of nginx and how to optimize Python application performance through NGINX. This article is compiled and presented by OneAPM, a domestic ITOM management platform. Python is famous for its ease of use, ease of software development, and is said to run better than other scripting languages. (Although the latest version of PHP, PHP 7, may give it serious competition.) Everyone wants their websites and applications to run a little faster. However, when the traffic of each website increases or a sudden traffic peak occurs
4. PHP AutoLoad automatic loading mechanism analysis practice grand theft auto margin 0 auto Xiaomin auto
Introduction: load,auto:PHP AutoLoad Automatic loading mechanism analysis practice: PHP autoload automatic loading mechanism can reduce unnecessary file inclusion, thereby improving the operating performance of PHP websites to a certain extent. This article briefly introduces the principle and usage of the autoload automatic loading mechanism in PHP. The most commonly used method of using __autoload is this method. Find the class file according to the class name, and then require_onefunction __autoload($class_name) { $path = str_replace('_',
Introduction:: I feel pretty good about myself. But when I was browsing around just now, I found something called Xhprof. After a brief look at the introduction, it seemed to be similar to my little plug-in. I would like to sort out the applications of Xhprof and compare it with my plug-in. Official website http://www.xhprof.com/ Install wget http://pecl.php.net/get/xhprof-0.9.4.tgz tar zxf xhprof-0.
##6.Monitor your SQL SERVER--Exposing bottlenecks_PHP tutorial Introduction: Monitor your SQL SERVER--Expose bottlenecks. When you suspect that computer hardware is the main reason affecting the running performance of SQL Server, you can monitor the load of the corresponding hardware through SQL Server Performance Monitor to confirm your guess and find out the cause 7 . Analysis of the array_keys and array_unique function source code in PHP, arraykeys_PHP tutorial Introduction: Analysis of the array_keys and array_unique function source code in PHP, arraykeys. Analysis of the array_keys and array_unique function source code in PHP, arraykeys performance analysis from the perspective of running performance, look at the following test code: $test=array();for($run=0; $run10000; $run++) 8. XCache 2.0.0 is released to improve PHP running performance Introduction: PHP Tutorial 9. Is it good to write a lot of comments in PHP program? How to solve Introduction: Is it good to write a lot of comments in PHP program? I write PHP code with a lot of comments. Will it have any negative impact on PHP running performance? There are so many comments that I have more time than the code itself. Are there any disadvantages? For example: //This is the core functional area of voting. As long as the user does not vote today, he can vote //Successful voting: 1. Add one vote to the corresponding row record of this voting table 2. Add the voting record of the user to the voting record table to prevent He will vote again today. $voteid=$_GET["vote ##10. Introduction: Is it okay to write a lot of comments in PHP programs? I write a lot of comments in PHP code. Will there be any negative impact on the running performance of PHP? , there is more time than the code itself. Are there any disadvantages? For example: //This is the core functional area of voting. As long as the user does not vote today, he can vote: 1. The corresponding row record of this voting table increases by one. Vote 2. Add the user’s voting record to the voting record table to prevent him from voting again today $voteid=$_GET["vote ##[Related Q&A recommendations]: javascript - Many js frameworks now advocate virtual dom. Why can't virtual dom be implemented at the browser layer? php - The website SMS interface is crawled, affecting website performance 
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