有人会弄sphinx么，启动不来

[lhx2008]

Coreseek Fulltext 4.1 [ Sphinx 2.0.2-dev (r2922)]
Copyright (c) 2007-2011,
Beijing Choice Software Technologies Inc (http://www.coreseek.com)

using config file '/usr/local/coreseek/etc/csft.conf'...
WARNING: compat_sphinxql_magics=1 is deprecated; please update your application and config
listening on all interfaces, port=9312
precaching index 'bbs_thread'
WARNING: rotating index 'bbs_thread': .new preload failed: mmap() failed: Cannot allocate memory (length=749484704); NOT SERVING
WARNING: index 'bbs_thread': preload: mmap() failed: Cannot allocate memory (length=749484704); NOT SERVING
precaching index 'delta_thread'
WARNING: rotating index 'delta_thread': .new preload failed: mmap() failed: Cannot allocate memory (length=749484704); NOT SERVING
WARNING: index 'delta_thread': preload: mmap() failed: Cannot allocate memory (length=749484704); NOT SERVING
FATAL: no valid indexes to serve
什么问题。。蛋疼