问题一:

Allocating and attaching to shared memory...FAILED

错误信息

Allocating and attaching to shared memory...FAILED
   oninit: Fatal error in shared memory creation
   online.log出现：
   01:45:13  shmget: [EEXIST][17]: key 52a24801: shared memory already exists
   01:45:13  mt_shm_init: can't create resident segment

解决方案：

修改配置文件onconfig中的服务器标识号即可（默认为0）,可以随意设置,
只要是唯一就可以了，不能过大。在多实例安装中常出现此问题。例如

SERVERNUM 49 # Unique id corresponding to a Dynamic Server instance

问题2:

DISK INITIALIZATION ABORTED: potential instance overwrite detected.

错误信息

DISK INITIALIZATION ABORTED: potential instance overwrite detected.
    To disable this check, set FULL_DISK_INIT to 1 in your config file and retry.
   oninit: Fatal error in shared memory initialization

解决方案：

在onconfig文件中找到FULL_DISK_INIT，将其后的0改为1