DB2锁表相关笔记
1、看锁表的情况db2的命令中：
db2 => get snapshot for locks on databasename
可以看到什么表被锁住了。
其中有一项： Application handle表示进程的标识号。该进程锁住什么表在下面会详细的列出来。
或者
list application for database yourdatabasename show detail
看看应用程序执行的情况
2、断掉连接：
通过
force application all //强行终止所有连接
terminate //清除所有db2的后台进程
将所有的进程全部清除
或者：
force application(进程号)，将特定的进程号kill
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---查看SAMPLE库上表的锁数量
SELECT TABSCHEMA, TABNAME, COUNT(*) AS NUMBER_OF_LOCKS_HELD
FROM SYSIBMADM.LOCKS_HELD
--WHERE DB_NAME = 'SAMPLE'
GROUP BY DBPARTITIONNUM, TABSCHEMA, TABNAME
----查询数据库锁表信息
db2 "select agent_id, tabschema,tabname from sysibmadm.snaplock"
----查看锁等待
SELECT SMALLINT(AGENT_ID) AS WAITING_ID, SUBSTR(APPL_NAME, 1,10) AS WAITING_APP, SUBSTR(AUTHID,1,10) AS WAITING_USER, SMALLINT(AGENT_ID_HOLDING_LK) AS HOLDER_ID, LOCK_MODE AS HELD, LOCK_OBJECT_TYPE AS TYPE, LOCK_MODE_REQUESTED AS REQUEST FROM SYSIBMADM.LOCKWAITS
查看锁表信息
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SELECT substr(TABSCHEMA,1,10), substr(TABNAME,1,20), COUNT(*) AS NUMBER_OF_LOCKS_HELD FROM SYSIBMADM.LOCKS_HELD GROUP BY DBPARTITIONNUM, TABSCHEMA, TABNAME
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