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  • oracle死锁模拟

    环境介绍:

    用户test01 创建表tab01,用户test02创建表tab02。Test01 更新tab01不提交,test02 更新表tab02不提交。然后test01 更新test02下的表tab02,此时有锁阻塞、锁等待情况发生。接着test02 更新test01下的tab01,那么此时就会有 test01、test02 都在等待对方的资源,但是资源无法释放,满足死锁条件死锁产生!

    实施步骤

    SQL> create user test01 identified by test01;

    User created.

    SQL> create user test02 identified by test02;

    User created.

    SQL> grant create session to test01, test02

    Grant succeeded.

    SQL> grant resource to test01,test02;

    Grant succeeded.

    SQL> grant all on test02.tab02 to test01;

    Grant succeeded.

    SQL> grant all on test01.tab01 to test02;

    Grant succeeded.

    SQL> conn test01/test01

    Connected.

    SQL> create table tab01 (id number);

    Table created.

    SQL> insert into tab01 values(01);

    1 row created.

    SQL> commit;

    Commit complete.

    SQL> select * from tab01;

            ID

    ----------

             1

    SQL> conn test02/test02

    Connected.

    SQL> create table tab02 (id number);

    Table created.

    SQL> insert into tab02 values(02);

    1 row created.

    SQL> select * from tab02;

            ID

    ----------

             2

    会话1

    SQL> update tab01 set id=id*1;

    1 row updated.

    会话2

    SQL> conn test02/test02

    Connected.

    SQL> update tab02 set id=id*1 ;

    1 row updated.

    会话2

    SQL> update test01.tab01 set id=id*1;

    此时该事务被hang住

    会话1

    SQL> update test02.tab02 set id=id*1;

    update test02.tab02 set id=id*1

                  *

    ERROR at line 1:

    ORA-00060: deadlock detected while waiting for resource

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  • 原文地址:https://www.cnblogs.com/iyoume2008/p/4690643.html
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