使用内存最少的Django haystack搜索引擎?

I'm using webfaction as a host and they only give me 80mb of memory. I originally wanted to use Solr to do a real time search index but it uses at least 50mb to run and more I'm guessing when I actually do stuff. Plus running the website takes the rest of the memory.I'm using webfaction as a host and they only gi