vlc vlc [http://community.jboss.org/people/vlc] created the discussion "Connection Pool (DataSource) is slow" To view the discussion, visit: http://community.jboss.org/message/626762#626762 -------------------------------------------------------------- Hi Community, I am using the following MySQL DataSource XML: | | <jndi-name>MySQLDB</jndi-name> | | | <xa-datasource-property name="URL">jdbc:mysql://127.0.0.1:3306/db</xa-datasource-property> | | | <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> | | | <user-name>username</user-name> | | | <password>password</password> | | | <!-- <track-connection-by-tx>true</track-connection-by-tx> --> | | | <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> | | | <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name> | | | <min-pool-size>10</min-pool-size> | | | <max-pool-size>100</max-pool-size> | | | <idle-timeout-minutes>15</idle-timeout-minutes> | | | <blocking-timeout-millis>500</blocking-timeout-millis> | | | <track-statements>true</track-statements> | I am doing something like this: 0. create at application startup DataSource (InitialContext, lookup()) 1. execute at each request java.sql.Connection = ds.getConnection(); 2. do queries (PreparedStatement-s, ResultSet-s) 3. close PreparedStatement-s, ResultSet-s, Connection object TEST: I execute 100 or 1000 requests requiring connection to the Database. The problem is DataSource.getConnection() takes very often 500 ms ~ 600 ms. At every get connection a new WrappedConnection object is returned (but I expect to reuse some already created connections) "show processlist" in MySQL show always 10 connections, jmx-console shows the pool is working with information like: created, in-use, destroyed connections. Please give me some answars: 1. Why getConnection() function is so slow? 2. Why diferrent WrappedConnection objects are create at each getConnection() call? 3. The pool is between 10~100. Why does not exceed 10 connections even I execute 100 or 1000 parallel requests. Thank you for your interest. Cristi, -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/626762#626762] Start a new discussion in Datasource Configuration at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]