客户的RAC数据库出现ORA-27090错误。
详细的错误信息如下：
Wed May 2 22:13:14 2012 Completed instance recovery at Thread 1: logseq 22430, block 190818, scn 5430629987 4110 DATA blocks READ, 4503 DATA blocks written, 43017 redo blocks READ Wed May 2 22:13:15 2012 Thread 1 advanced TO log SEQUENCE 22431 (thread recovery) Wed May 2 22:13:16 2012 Errors IN file /u01/app/oracle/admin/orcl/bdump/orcl2_p007_15968.trc: ORA-27090: Message 27090 NOT found; product=RDBMS; facility=ORA Linux-x86_64 Error: 4: Interrupted system CALL Additional information: 3 Additional information: 128 Additional information: 65536 Wed May 2 22:13:16 2012 Errors IN file /u01/app/oracle/admin/orcl/bdump/orcl2_p008_15970.trc: ORA-27090: Message 27090 NOT found; product=RDBMS; facility=ORA Linux-x86_64 Error: 4: Interrupted system CALL Additional information: 3 Additional information: 128 Additional information: 65536 Wed May 2 22:13:16 2012 Errors IN file /u01/app/oracle/admin/orcl/bdump/orcl2_p004_15962.trc: ORA-27090: Message 27090 NOT found; product=RDBMS; facility=ORA Linux-x86_64 Error: 4: Interrupted system CALL Additional information: 3 Additional information: 128 Additional information: 65536 . . . Wed May 2 22:13:16 2012 Errors IN file /u01/app/oracle/admin/orcl/bdump/orcl2_p014_15995.trc: ORA-27090: Message 27090 NOT found; product=RDBMS; facility=ORA Linux-x86_64 Error: 4: Interrupted system CALL Additional information: 3 Additional information: 128 Additional information: 65536 Wed May 2 22:13:29 2012 SMON: Parallel TRANSACTION recovery tried |
问题发生在RAC一个节点崩溃后，所有的错误都发生在并行进程PNNN上。查看了一下MOS，发现这个问题是由于系统参数配置不当所致：ORA-27090: MESSAGE 27090 NOT FOUND; [ID 579108.1]。
内核参数的值：aio-max-nr设置太低，推荐设置为fs.aio-max-nr= 3145728。修改参数使用sysctl –p重新加载参数后，重启数据库即可。