We often hear Join join queries that avoid using MySQL because of poor performance. Is this the case?Let's try it out.
Storage Engine: InnoDB
Index type: default optimized B+tree
2.1 Table preparation and data preparation
We plan to create five tables and insert 10W pieces of data into them, ...
Posted on Tue, 02 Jun 2020 07:53:10 -0400 by hanpedro
It's like this.
In the middle of the night, I got a question from a big stock broker about programming.
Bogor, have you slept?
Inner OS: As a financial mob, how come I ask questions about programming so late?
Later, I learned that they had organized a competition within their company - interest rate forecasts.
That's true. It's not simple. I ...
Posted on Tue, 02 Jun 2020 04:09:52 -0400 by Anco
I don't know if you've received this requirement, so just execute some logic when the project starts.For example, simple cache preheating, or broadcasting after going online, and so on.If you use the Spring Boot framework, you can do so with its interfaces CommandLineRunner and ApplicationRunner.
Posted on Mon, 01 Jun 2020 22:56:55 -0400 by vjbrantner@purd
Spring Boot profile encryption and decryption is as simple as that
Following "Return of Missing Persons, mybatis-plus 3.3.2 Release" , provides a very practical function, "Data Security Protection", which not only supports the configuration encryption of data sources, but also enables the encryption of sensitiv ...
Posted on Mon, 01 Jun 2020 21:04:17 -0400 by dspeer
Role of thread pool:
1. Avoid the cost of creating and destroying threads when processing short-term tasks;
2. In a large number of concurrent tasks, system resources can be used more reasonably to cut peak and level Valley to ensure the stability of system operation;
It has the following advantages to build thread pool based on C++11 standa ...
Posted on Mon, 01 Jun 2020 11:39:53 -0400 by scuba
1. Download flowable-6.5.0 from the official website: https://flowable.com/open-source/downloads/
After downloading and unzipping, open the directory wars
2. Find a clean tomcat8
In the war file directory
flowable-admin.war flowable-idm.war flowable-modeler.war flowable-rest.war flowable-task.war
A total of 5 war packages are placed in ...
Posted on Mon, 01 Jun 2020 11:10:09 -0400 by krelian
Message queuing is a common way of communication between threads, which is often used to solve the communication between threads of the classic model producer consumer model.
This paper will end the implementation of message queue based on C + + standard library, which can support any parameter type and the number of task parameters.
In ord ...
Posted on Mon, 01 Jun 2020 10:21:37 -0400 by gowni
This paper is composed of ImportNew-freely flowing style of writing Translation from javacodegeeks . Welcome to join Java team . Please refer to the requirements at the end of the article for reprint.
Singleton classes are very common in Java developers, but they pose many challenges to junior developers. One of the key challenges they face i ...
Posted on Mon, 01 Jun 2020 10:01:25 -0400 by will_1990
A Spring project, which runs after jar package, is normal when there is a network, but once there is no network, an error will be reported. What's the matter? This article will record the troubleshooting process.
A graphical interface with a local database is required to be able to run in a non network environment. The graphical in ...
Posted on Mon, 01 Jun 2020 00:56:38 -0400 by Ozzapoo
Environment wins10 8g memory mysql5.7.27
mysql my.ini Configuration note (innodb_flush_log_at_trx_commit=0) configuration
#Set 3306 port
port = 3306
#Set 3306 port
port = 3306
# Set the installation directory of mysql
# Set the storage directory of mysql database data
Posted on Sun, 31 May 2020 10:10:15 -0400 by cofey12681