Oracle18c单实例安装

安装环境：

CentOS release 6.5 (Final)  RAM:2GB  SWAP:4GB DISK:40GB

一. 安装环境检查

1. 服务器硬件 

Minimum RAM

At least 1 GB RAM for Oracle Database installations. 2 GB RAM recommended. At least 8 GB RAM for Oracle Grid Infrastructure installations.

[root@orcl ~]# grep MemTotal /proc/meminfo
MemTotal:        1907580 kB

2. 操作系统

Red Hat Enterprise Linux 6.4：2.6.32-358.el6.x86_64或更高版本

--建议关闭透明大页

禁用透明HugePages

Oracle建议您禁用Transparent HugePages并使用标准HugePages来提高性能。

Oracle建议禁用Transparent HugePages，因为它们可能会导致访问内存的延迟，从而导致Oracle RAC环境中的节点重新启动，或Oracle Database单实例的性能问题或延迟。建议使用标准的HugePages for Linux。 

 3. 服务器配置

--/tmp目录

Disk space allocated to the /tmp directory

At least 1 GB of space in the /tmp directory.

 

[root@orcl ~]# df -h /tmp
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        36G   11G   24G  32% /

 --swap

Swap space allocation relative to RAM (Oracle Database)

Between 1 GB and 2 GB: 1.5 times the size of the RAM Between 2 GB and 16 GB: Equal to the size of the RAM More than 16 GB: 16 GB Note: If you enable HugePages for your Linux servers, then you should deduct the memory allocated to HugePages from the available R