本文档描述了在Red Hat Enterprise Linux 6.5环境下，Oracle数据库在启用了大页内存后遇到ORA-27100错误的问题。解决方案是通过在/etc/sysctl.conf文件中注释掉vm.nr_hugepages参数，并执行sysctl -p命令使更改生效，从而成功启动数据库。
测试环境版本信息：
[root@sourcedb ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.5 (Santiago)
[root@sourcedb ~]# su - oracle
[oracle@sourcedb ~]$ sqlplus
SQL*Plus: Release 11.2.0.4.0 Production on Fri Apr 14 07:12:04 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
[root@sourcedb ~]# free -m
total used free shared buffers cached
Mem: 988 472 515 0 0 23
-/+ buffers/cache: 448 540
Swap: 2047 265 1782
[r
[root@sourcedb ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.5 (Santiago)
[root@sourcedb ~]# su - oracle
[oracle@sourcedb ~]$ sqlplus
SQL*Plus: Release 11.2.0.4.0 Production on Fri Apr 14 07:12:04 2017
Copyright (c) 1982, 2013, Oracle. All rights reserved.
[root@sourcedb ~]# free -m
total used free shared buffers cached
Mem: 988 472 515 0 0 23
-/+ buffers/cache: 448 540
Swap: 2047 265 1782
[r
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