No i/o? No sstable counts going up in cfhistograms? Is the heap so full you're experiencing GC pressure that way?
On Fri, Nov 18, 2011 at 3:46 PM, Todd Burruss <bburr...@expedia.com> wrote: > Ok, I figured something like that. Switching to > ConcurrentLinkedHashCacheProvider I see it is a lot better, but still > instead of the 25-30ms response times I enjoyed with no caching, I'm > seeing 500ms at 100% hit rate on the cache. No old gen pressure at all, > just ParNew crazy. > > More info on my use case is that I am picking 50 columns from the 70k. > Since the whole row is in the cache, and no copying from off-heap nor disk > buffers, seems like it should be faster than non-cache mode. > > More thoughts :) -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
