如何处理Ruby 2.1.2内存泄漏?

I have a worker process which spawns up to 50 threads and do some async operations (most of which are http calls). When I start up the process, it starts with some 35MB of used memory, and quickly grows to 250MB. From that point it grows further more and the problem is that the memory never stops growing (even though the growing phase decreases over time). After several days, process just outgrows the available memory and crashes.I have a worker process which spawns up to 50 t