Pentaho的創建許多休眠連接

Question

我設置maxactive = 20，但是當我執行SHOW PROCESSLIST我展示過30的連接是這樣的：

109051 | root | localhost:33203  | hibernate | Sleep | 4 |  | N 

這是我的設置：

mysql5.hibernate.cfg .XML

<property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property><property name="hibernate.generate_statistics">true</property> 
<property name="hibernate.cache.use_query_cache">true</property> 
<property name="connection.driver_class">com.mysql.jdbc.Driver</property> 
<property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property> 
<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property> 
<property name="connection.username">user</property> 
<property name="connection.password">password</property> 
<property name="connection.pool_size">10</property> 
<property name="show_sql">false</property> 
<property name="hibernate.jdbc.use_streams_for_binary">true</property> 
<property name="hibernate.hbm2ddl.auto">update</property> 
<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property><property name="hibernate.c3p0.acquire_increment">1</property> 
<property name="hibernate.c3p0.idle_test_period">10</property> 
<property name="hibernate.c3p0.min_size">5</property> 
<property name="hibernate.c3p0.max_size">75</property> 
<property name="hibernate.c3p0.max_statements">0</property> 
<property name="hibernate.c3p0.timeout">300</property> 
<property name="hibernate.c3p0.preferredTestQuery">select 1</property> 
<property name="hibernate.c3p0.testConnectionOnCheckout">true</property> 

的context.xml

<Context path="/pentaho" docbase="webapps/pentaho/"> 
<Resource name="jdbc/Hibernate" auth="Container" type="javax.sql.DataSource" factory="org.apache.commons.dbcp.BasicDataSourceFactory" maxActive="20" maxIdle="5" maxWait="10000" username="user" password="password" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/hibernate" validationQuery="select 1"/> 
<Resource name="jdbc/Quartz" auth="Container" type="javax.sql.DataSource" factory="org.apache.commons.dbcp.BasicDataSourceFactory" maxActive="20" maxIdle="5" maxWait="10000" username="user" password="password" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/quartz" validationQuery="select 1"/> 
</Context> 

我該如何解決這個問題？ 最佳方面

Answer 1

hibernate.c3p0.max_size這是 池中的最大連接數。如果此編號爲 已耗盡，則會在運行時引發異常。

而且你必須：

<property name="hibernate.c3p0.max_size">75</property> 

所以將其更改爲：

<property name="hibernate.c3p0.max_size">20</property>