Tag Archives: EVENT

密码延迟验证导致的系统HANG住

Posted on 2013/07/20 by yangtingkun

又是一个11g新特性导致的问题。 这个新特性很早之前就研究过，也在其他客户处碰到过类似的问题。从11g开始，如果一个用户使用不正确的密码尝试登录数据库，那么随着登录失败次数的增加，每次登录验证前延迟等待的时间也会增加： SQL> SET TIME ON 18:30:54 SQL> 18:30:58 SQL> conn test/test Connected. 18:31:25 SQL> 18:31:25 SQL> conn test/a conn test/a conn test/a conn test/a conn test/a conn test/a conn test/a conn test/test conn test/a ERROR: ORA-01017: invalid username/password; logon … Continue reading →

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ORA-7445(ksuklms)错误

Posted on 2012/05/17 by yangtingkun

客户的11.2.0.2 RAC环境出现了这个ORA-7445[ksuklms]错误。 错误信息为： 2012-05-10 16:25:38.561000 +08:00 Exception [TYPE: SIGSEGV, Address NOT mapped TO object] [ADDR:0x163A] [PC:0x100A554A8, ksuklms()+392] [flags: 0x0, COUNT: 1] Errors IN file /app/diag/rdbms/orcl/orcl1/trace/orcl1_ora_28387.trc (incident=449642): ORA-07445: exception encountered: core dump [ksuklms()+392] [SIGSEGV] [ADDR:0x163A] [PC:0x100A554A8] [Address NOT mapped TO object] … Continue reading →

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