: > Also, I'm still suspicious about your application. You have 1.5M : > distinct tags for 4M documents? That seems quite dense.
it's possible the app is using the filterCache for other things (on other fields) besies just the tag field ... but that still doesn't explain one thing... : description: LRU Cache(maxSize=1000000, initialSize=600000, ...that doesn't look like it matches the config you posted earlier... >>>: <filterCache >>>: class="solr.LRUCache" >>>: size="1500000" <--- not 1000000 ...either way if you have that many unique "tags" i think the HashDocSet suggestion may be the best way to go, since each tag probably has a very low cardinality (i can't imagine they'd be very high with that kind of ratio) I would also give serious thought to caching the solr results externally (using squid or memcached or something like that) ... Solr will cache the individual computations for you very well .. but for something like a tag cloud you probably don't care about the exact numeric values that much, and minor fluctuations as tags are added removed (or new items come in) aren't going to be a big issue. -Hoss
