On Fri, Mar 13, 2009 at 12:58 PM, Jon Baer <jonb...@gmail.com> wrote: > I have a few general questions re: caching ... > > 1. The FastLRU cache in 1.4 seems promising but is there a more > comprehensive list of benefits? Is there a huge speed boost for using this > type of cache?
It simply removes contention for readers.... you would see gains under high load and when the cache hit rate is very high (and esp if there are multiple cache checks per request... like the enum faceting method does with the filter cache). > 2. What are the possibilities to using external caches for scaling out like > memcachedb or redis? Is this just a matter of interfacing SolrCache? Would be doable, but slower unless the circumstances were very special. > 3. Does the autowarming of a new searcher use any type of statistics on the > old one? How does it figure what to pull from old cache if autowarmCount is > set low? IE can I get the most popular or is it ordered based on something > in the docs themselves? For our LRU caches, it's the most recently used items. -Yonik http://www.lucidimagination.com
