oracle错误求助，急

redhat7.1+oracle8i
有如下错误，请指教，谢谢，我是linux新手。
<!--StartFragment-->login(pam_unix)[8675]: session closed for user
maintenance
May 12 06:18:49 magenta kernel: __alloc_pages: 0-order allocation failed.
May 12 06:18:50 magenta last message repeated 32 times
May 12 06:18:50 magenta kernel: __alloc_pages: 3-order allocation failed.
May 12 06:18:50 magenta kernel: __alloc_pages: 3-order allocation failed.
May 12 06:18:54 magenta kernel: __alloc_pages: 0-order allocation failed.
May 12 06:18:56 magenta last message repeated 90 times
May 12 06:18:56 magenta kernel: failed.
May 12 06:18:56 magenta kernel: __alloc_pages: 0-order allocation failed.
May 12 06:18:56 magenta last message repeated 727 times