我正在写一个自定义的文件系统爬虫,它通过了sys.stdin来处理数以百万计的球。我发现,在运行脚本时,随着时间的推移,其内存使用量会大量增加,整个事情几乎都会停止。我写了一个小问题,下面显示了这个问题。我做错了什么,或者我在Python/glob模块中发现了一个错误? (我正在使用python 2.5.2)。为什么我用这个python循环泄漏内存?
#!/usr/bin/env python
import glob
import sys
import gc
previous_num_objects = 0
for count, line in enumerate(sys.stdin):
glob_result = glob.glob(line.rstrip('\n'))
current_num_objects = len(gc.get_objects())
new_objects = current_num_objects - previous_num_objects
print "(%d) This: %d, New: %d, Garbage: %d, Collection Counts: %s"\
% (count, current_num_objects, new_objects, len(gc.garbage), gc.get_count())
previous_num_objects = current_num_objects
输出看起来像:
(0) This: 4042, New: 4042, Python Garbage: 0, Python Collection Counts: (660, 5, 0) (1) This: 4061, New: 19, Python Garbage: 0, Python Collection Counts: (90, 6, 0) (2) This: 4064, New: 3, Python Garbage: 0, Python Collection Counts: (127, 6, 0) (3) This: 4067, New: 3, Python Garbage: 0, Python Collection Counts: (130, 6, 0) (4) This: 4070, New: 3, Python Garbage: 0, Python Collection Counts: (133, 6, 0) (5) This: 4073, New: 3, Python Garbage: 0, Python Collection Counts: (136, 6, 0) (6) This: 4076, New: 3, Python Garbage: 0, Python Collection Counts: (139, 6, 0) (7) This: 4079, New: 3, Python Garbage: 0, Python Collection Counts: (142, 6, 0) (8) This: 4082, New: 3, Python Garbage: 0, Python Collection Counts: (145, 6, 0) (9) This: 4085, New: 3, Python Garbage: 0, Python Collection Counts: (148, 6, 0)
每第100次迭代,100个对象被释放,所以len(gc.get_objects()
增加了200每100次迭代。 len(gc.garbage)
决不会从0开始变化。第2代收集计数缓慢增加,而第0和第1个计数增加和减少。
此积累了很多未收集的对象。但是,这并没有停下来,是吗?你能制作一个类似的小脚本,实际上是爬行停下来的吗? – 2010-02-02 12:51:24