Dynamic MMap ran out of room

issue description:

"'E:Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf), E:Error occurred while processing squid3 (NewFileVer1), E:Problem with MergeList /var/lib/apt/lists/ubuntu.cn99.com_ubuntu_dists_hardy_universe_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.'

E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf)
E: Error occurred while processing squid3 (NewFileVer1)
E: Problem with MergeList /var/lib/apt/lists/ubuntu.cn99.com_ubuntu_dists_hardy_universe_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.
E: _cache->open() failed, please report.

W: Unable to munmap"

delete ubuntu.cn99.com  from the source list (/etc/apt/sourcelist)