python Threadpoolexcutor导致内存爆满
原因:Threadpoolexcutor默认使用的是无界队列,如果消费任务的速度低于生产任务,那么会把生产任务无限添加到无界队列中。导致内存被占满
解决方案:修改无界队列为有界队列
from concurrent.futures import ThreadPoolExecutor
import queue
class BoundedThreadPoolExecutor(ThreadPoolExecutor):def __init__(self, max_workers=None, thread_name_prefix=''):
super().__init__(max_workers, thread_name_prefix)
self._work_queue = queue.Queue(self._max_workers * 2) # 队列大小为最大线程数的两倍
def fun(i):
time.sleep(5)
print(i)
if __name__ == '__main__':
t = BoundedThreadPoolExecutor()
for i in range(1000000000):
t.submit(fun, i)
t.shutdown()
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