2010/2/12 Shalin Shekhar Mangar <shalinman...@gmail.com>: > 2010/2/12 Tim Terlegård <tim.terleg...@gmail.com> > >> Does Solr use some sort of a persistent cache? >> > Solr does not have a persistent cache. That is the operating system's file > cache at work.
Aha, that's very interesting and seems to make sense. So is the primary goal of warmup queries to allow the operating system to cache all the files in the data/index directory? Because I think the difference (768ms vs 52ms) is pretty big. I just do one warmup query and get 52 ms response on a 40 million documents index. I think that's pretty nice performance without tinkering with the caches at all. The only tinkering that seems to be needed is this operating system file caching. What's the best way to make sure that my warmup queries have cached all the files? And does a file cache have the complete file in memory? I guess it can get tough to get my 100GB index into the 16GB memory. /Tim
