typical experiment. Redis 2.0.4 deployed on my macbook pro.
Saves enabled. appendfsync off. vm enabled, 1g max memory. 72 databases. Each database asked to store 13*N key-value pairs with lpush, bucket size not very big, N -> 500,000. Client jredis. Start running against a stream of inputs. Sooner or later, client times out 'last operation not performed'. These could be jredis bugs, but I don't care to find out.