HikariCP connection pool configuration

HikariCP claims to be the best performing Java database connection pool. Although I haven't done a personal test, the company's project has been used all the time. It has probably experienced about 20,000 users online at the same time, and there is no problem in the performance of the link pool.

Official website: http://brettwooldridge.github.io/HikariCP/

The example has been uploaded to the code cloud: https://gitee.com/imlichao/HikariCP-example

 

Install

maven coordinates (this is the coordinates of java8, corresponding to different versions of jdk need to use different versions)

<dependency>
    <groupId>com.zaxxer</groupId>
    <artifactId>HikariCP</artifactId>
    <version>2.7.6</version>
</dependency>

 

configure

Add HikariCP configuration file, set connection pool configuration

package pub.lichao.test.config;

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;


/**
 * HikariCP连接池配置
 */
@Configuration
public class DataSourceConfig {

    @Value("${spring.datasource.url}")
    private String dataSourceUrl;

    @Value("${spring.datasource.username}")
    private String user;

    @Value("${spring.datasource.password}")
    private String password;

    @Bean
    public DataSource primaryDataSource() {
        HikariConfig config = new HikariConfig();
        config.setJdbcUrl(dataSourceUrl); //数据源
        config.setUsername(user); //用户名
        config.setPassword(password); //密码
        config.addDataSourceProperty("cachePrepStmts", "true"); //是否自定义配置，为true时下面两个参数才生效
        config.addDataSourceProperty("prepStmtCacheSize", "250"); //连接池大小默认25，官方推荐250-500
        config.addDataSourceProperty("prepStmtCacheSqlLimit", "2048"); //单条语句最大长度默认256，官方推荐2048
        config.addDataSourceProperty("useServerPrepStmts", "true"); //新版本MySQL支持服务器端准备，开启能够得到显著性能提升
        config.addDataSourceProperty("useLocalSessionState", "true");
        config.addDataSourceProperty("useLocalTransactionState", "true");
        config.addDataSourceProperty("rewriteBatchedStatements", "true");
        config.addDataSourceProperty("cacheResultSetMetadata", "true");
        config.addDataSourceProperty("cacheServerConfiguration", "true");
        config.addDataSourceProperty("elideSetAutoCommits", "true");
        config.addDataSourceProperty("maintainTimeStats", "false");

        HikariDataSource ds = new HikariDataSource(config);
        return ds;
    }
}

Configure data source parameters in SpringBoot application.properties (for specific parameter meanings, please refer to spring boot related instructions)

# Server HTTP port.
server.port=8090

spring.datasource.url=jdbc:mysql://rdso30006c33s57oufvfo.mysql.rds.aliyuncs.com:3306/pltx-test?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
spring.datasource.username=*******
spring.datasource.password=*******
spring.datasource.driverClassName=com.mysql.jdbc.Driver

spring.datasource.max-idle=10
spring.datasource.max-active=15
spring.datasource.max-lifetime=86430000
spring.datasource.log-abandoned=true
spring.datasource.remove-abandoned=true
spring.datasource.remove-abandoned-timeout=60
spring.datasource.initialize=false
spring.datasource.sqlScriptEncoding=UTF-8

For the determination of the number of connections, please refer to: https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing

 

Start the project and we can see that the project uses the HikariCP connection pool