informix初始化的系列问题？

Question

在使用oninit －ivy 的时候，出现问题。日志：
IBM Informix Dynamic Server Started.
16:55:59  Warning: ONCONFIG dump directory (DUMPDIR) '/home/informix/ifxtmp' has insecure permissions
16:55:59  Error: Unable to reset open files limit, must run as super-user
16:55:59  Event alarms enabled.  ALARMPROG = '/home/informix/etc/no_log.sh'
16:55:59  Booting Language <c> from module <>
16:55:59  Loading Module <CNULL>
16:55:59  Booting Language <builtin> from module <>
16:55:59  Loading Module <BUILTINNULL>
16:56:04  IBM Informix Dynamic Server Version 9.40.UC8     Software Serial Number ABB#B000000
16:56:04  The chunk '/home/informix/dbspace/rootdbs' will not fit in the space specified.

16:56:04  IBM Informix Dynamic Server Stopped.

16:56:04  mt_shm_remove: WARNING: may not have removed all/correct segments

根据google所得的提示：修改临时目录tmp 为 ifxtmp但是Warning:问题依旧；
Error: Unable to reset open files limit 这句什么意思啊，要修改
打开文件的限制吗？我的内存为2G，shmmax＝2G
he chunk '/home/informix/dbspace/rootdbs' will not fit in the space specified.
这句话什么意思了？