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entity manager close

Posted by dbtan on 三月 24th, 2017

前言 entity manager未关闭造成的影响 spring jpa version:1.10.1 底层hibernate: 5.1.0 场景 某些情况需要自行写sql,然后就用到了EntityManager, 用完之后没有显示的close(==|||) 上线后大量请求超时,偶尔有那么几个请求会快 问题定位 首先确定不是数据库正在的查询慢,目前量还很小,然后找到sql去数据库查询系统确认,查
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How To Automate Cleanup Of Dead Connections And INACTIVE Sessions [ID 206007.1]

Posted by dbtan on 九月 15th, 2010

How To Automate Cleanup Of Dead Connections And INACTIVE Sessions [ID 206007.1] Modified 25-JUN-2009     Type HOWTO     Status PUBLISHED PURPOSE ------- This note explains the difference between a dead connection and an INACTIVE session in v$session
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如何重新配置Oracle的EM Database Control

Posted by dbtan on 十月 25th, 2009

今天打算启用一下Oracle Database 11g的Database Control,但提示如下: [oracle@test7: ~]$emctl status dbconsoleOC4J Configuration issue. /oracle/product/11.1.0/db_1/oc4j/j2ee/OC4J_DBConsole_test7_ccdb not found. 马上来看一下相应目录下,是否有OC4J_DBConsole_test7_ccdb呢? [oracle@test7: ~/product/
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EXP-00091解决方法

Posted by dbtan on 九月 8th, 2009

在EXP导出时,出现EXP-00091报错: . . exporting table                         FRIEND..............             &
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