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Yyds dry inventory Druid connection pool usage

2022-06-26 07:31:00 【Feng, crazy】

brief introduction

Druid Able to provide strong ⼤ Monitoring and expansion functions of .

⼀、 send ⽤

1.1 maven To configure ：

      
      
       
       <dependency>
       
       
  <groupId>com.alibaba</groupId>
       
       
  <artifactId>druid</artifactId>
       
       
  <version>1.1.18</version>
       
       
</dependency>
      
      
      
      
       
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1.2 Integrate spring boot

      
      
       
       <dependency>
       
       
  <groupId>com.alibaba</groupId>
       
       
  <artifactId>druid-spring-boot-starter</artifactId>
       
       
  <version>1.1.18</version>
       
       
</dependency>
      
      
      
      
       
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⼆、 Monitoring statistics

2.1 open

https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter

2.2 send ⽤ And configuration StatViewServlet

https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE

Druid Built in provides ⼀ individual StatViewServlet⽤ Yu Zhan ⽰Druid Statistical information .

This StatViewServlet Of ⽤ Transit includes ：

Provide monitoring information exhibition ⽰ Of html page ⾯
Providing monitoring information JSON API

Be careful ： send ⽤StatViewServlet, It is suggested that ⽤druid 0.2.6 Above version .

2.3 send ⽤ And configuration WebStatFilter

https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_%E9%85%8D%E7%BD%AEWebStatFilter

WebStatFilter⽤ To collect web-jdbc Associated monitoring data .

2.4 send ⽤ And configuration Spring Association monitoring

https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_Druid%E5%92%8CSpring%E5%85%B3%E8%81%94%E7%9B%91%

Druid Provides Spring and Jdbc Associated monitoring of .

3、 ... and 、 Reference configuration

Database connection pool

DruidDataSource To configure

Druid Spring Boot Starter

https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter

3.1 Add the configuration

      
      
       
       spring.datasource.url=jdbc:mysql://localhost:3306/park?
       
       
useUnicode=true&characterEncoding=utf8mb4
       
       
spring.datasource.username=root
       
       
spring.datasource.password=123456
       
       
# ... Other configuration （ Optional , It's not necessary , send ⽤ If the database is embedded, the above three items can also be omitted ）
      
      
      
      
       
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3.2 Configuration properties

Druid Spring Boot Starter The name of the configuration property exactly follows Druid, You can go through Spring Boot To configure ⽂ To configure Druid Database connection

Pool connection and monitoring , If it is not configured, make ⽤ The default value is .

      
      
       
       ######## JDBC To configure  ########
       
       
#spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
       
       
spring.datasource.url=jdbc:mysql://localhost:3306/park?
       
       
useUnicode=true&characterEncoding=utf-8
       
       
spring.datasource.password=123456
       
       
spring.datasource.username=root
       
       
#spring.security.user.name=test
       
       
#spring.security.user.password=123456
       
       
################################### Start Druid  To configure 
       
       
###################################
       
       
######## ⼀、 Connection pool configuration  ########
       
       
spring.datasource.druid.initial-size=5
       
       
spring.datasource.druid.max-active=30
       
       
spring.datasource.druid.min-idle=5
       
       
#  Get the most ⼤ Waiting time （ms）
       
       
spring.datasource.druid.max-wait=60000
       
       
#  Configure monitoring statistics interception filters, Remove the post monitoring boundary ⾯sql⽆ Law statistics ,'wall'⽤ In case ⽕ wall  # Configure multiple English characters ⽂ Comma separated 
       
       
#  this ⾥ send ⽤ Are all default configurations , Sure ⾃ Definition 
       
       
spring.datasource.druid.filters=stat,wall
       
       
#  adopt connectProperties Property to open mergeSql function ; slow SQL Record 
       
       
spring.datasource.druid.connectionproperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
       
       
#  Merge multiple DruidDataSource Monitoring data 
       
       
spring.datasource.druid.use-global-data-source-stat=true
       
       
# Whether the cache preparedStatement, That is to say PSCache.PSCache Yes ⽀ The performance of database with cursor is greatly improved ⼤,⽐ If you say 
       
       
oracle. stay mysql The next suggestion is to close .
       
       
spring.datasource.druid.pool-prepared-statements=false
       
       
# To start ⽤PSCache, You have to configure ⼤ On 0, When ⼤ On 0 when ,poolPreparedStatements⾃ The automatic trigger is modified to true
       
       
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=0
       
       
# And on ⾯ Equivalence 
       
       
spring.datasource.druid.max-open-prepared-statements= 0
       
       
# ⽤ To check whether the connection is valid sql
       
       
spring.datasource.druid.validation-query=select 1 from dual
       
       
spring.datasource.druid.validation-query-timeout=60000
       
       
#  Apply for connection with ⾏validationQuery Check whether the connection is valid , This configuration will degrade performance .
       
       
spring.datasource.druid.test-on-borrow=false
       
       
#  Return the connection with ⾏validationQuery Check whether the connection is valid , This configuration will degrade performance .
       
       
spring.datasource.druid.test-on-return=false
       
       
#  Recommended configuration is true, No performance impact , And ensure safety . Check when applying for connection , If you have free time ⼤ On 
       
       
timeBetweenEvictionRunsMillis, Of board ⾏validationQuery Check whether the connection is valid 
       
       
spring.datasource.druid.test-while-idle=true
       
       
#  How long is the configuration interval ⾏⼀ Secondary test , Detects idle connections that need to be closed , In milliseconds 
       
       
spring.datasource.druid.time-between-eviction-runs-millis=60000
       
       
#  The connection remains idle ⽽ The best way not to be expelled ⼩ Time spring.datasource.druid.min-evictable-idle-time-millis=300000
       
       
spring.datasource.druid.max-evictable-idle-time-millis=300000
       
       
spring.datasource.druid.login-timeout=6000
       
       
######## ⼆、WebStatFilter To configure  ########
       
       
#
       
       
## WebStatFilter To configure , Please refer to Druid Wiki, To configure _ To configure WebStatFilter
       
       
spring.datasource.druid.web-stat-filter.enabled=true
       
       
spring.datasource.druid.web-stat-filter.url-pattern=/*
       
       
spring.datasource.druid.web-statfilter.exclusions=*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*,/druid
       
       
spring.datasource.druid.web-stat-filter.session-stat-enable=
       
       
spring.datasource.druid.web-stat-filter.session-stat-max-count=
       
       
spring.datasource.druid.web-stat-filter.principal-session-name=
       
       
spring.datasource.druid.web-stat-filter.principal-cookie-name=
       
       
spring.datasource.druid.web-stat-filter.profile-enable=
       
       
######## ⼆、StatViewServlet To configure  ########
       
       
#
       
       
## StatViewServlet To configure , Please refer to Druid Wiki, To configure _StatViewServlet To configure 
       
       
# Start or not ⽤StatViewServlet（ Monitoring page ⾯） The default value is false（ Considering the security problem, it is not started by default , To start ⽤ It is recommended to set a key or ⽩ List to ensure safety ）
       
       
spring.datasource.druid.stat-view-servlet.enabled=true
       
       
spring.datasource.druid.stat-view-servlet.url-pattern=/druid/*
       
       
spring.datasource.druid.stat-view-servlet.login-username=admin
       
       
spring.datasource.druid.stat-view-servlet.login-password=123456
       
       
#  Forbid ⽤HTML page ⾯ Upper “Reset All” function 
       
       
spring.datasource.druid.stat-view-servlet.reset-enable=false
       
       
# IP⽩ list ( Not configured or empty , All access is allowed )
       
       
spring.datasource.druid.stat-view-servlet.allow=
       
       
# IP⿊ list  ( In common ,deny Prior to the allow)
       
       
spring.datasource.druid.stat-view-servlet.deny=
       
       
########  3、 ... and 、StatViewServlet To configure  ########
       
       
#
       
       
## Spring Monitoring configuration , Please refer to Druid Github Wiki, To configure _Druid and Spring Associated monitoring configuration 
       
       
# Spring monitor AOP cut ⼊ spot , Such as x.y.z.service.*, Configure multiple English characters ⽂ Comma separated 
       
       
spring.datasource.druid.aoppatterns=com.xiaofu.park.controller.*,com.xiaofu.park.service.*,com.xiaofu.park.dao.
       
       
*
       
       
################################### End Druid  To configure 
       
       
###################################
      
      
      
      
       
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3.3 filter send ⽤

⽬ The former is the following Filter Provides configuration ⽀ a , Please refer to ⽂ Or according to IDE carry ⽰（spring.datasource.druid.filter.*） Into the ⾏ To configure .