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我使用Django为了从一个大图像堆栈(每个大约150mb)动态生成图像来存档网页。它假设是交互式的,所以我需要保持缓存选定的堆栈。为此,我使用了memcached缓存后端和“django.contrib.sessions.backends.cache”会话引擎。使用Django缓存大量数据时发生内存错误
问题是,当我使用会话数据呈现页面时,我不断收到MemoryError。 这是更有效的方法吗? 我认为这是数据大小的问题。无论如何增加内存大小?解决这个问题的另一种方法
在views.py
def images(request):
if request.method == 'POST':
info_form = InfoForm(request.POST)
if (info_form.is_valid()):
if selected_stack_changed:
matrix = get_matrix(stack_id)
request.session['matrix'] = matrix
else:
matrix = request.session['matrix']
return render(request, url)
在settings.py
CACHES = {
'default': {
'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
'LOCATION': '127.0.0.1:11211',
}
}
SESSION_ENGINE = "django.contrib.sessions.backends.cache"
这里完整的错误我得到:
Internal Server Error: /data/
Traceback (most recent call last):
File "/home/user/.local/lib/python2.7/site-packages/django/core/handlers/base.py", line 235, in get_response
response = middleware_method(request, response)
File "/home/user/.local/lib/python2.7/site-packages/django/contrib/sessions/middleware.py", line 50, in process_response
request.session.save()
File "/home/user/.local/lib/python2.7/site-packages/django/contrib/sessions/backends/cache.py", line 62, in save
self.get_expiry_age())
File "/home/user/.local/lib/python2.7/site-packages/django/core/cache/backends/memcached.py", line 83, in set
if not self._cache.set(key, value, self.get_backend_timeout(timeout)):
File "/home/user/.local/lib/python2.7/site-packages/memcache.py", line 740, in set
return self._set("set", key, val, time, min_compress_len, noreply)
File "/home/user/.local/lib/python2.7/site-packages/memcache.py", line 1060, in _set
return _unsafe_set()
File "/home/user/.local/lib/python2.7/site-packages/memcache.py", line 1034, in _unsafe_set
store_info = self._val_to_store_info(val, min_compress_len)
File "/home/user/.local/lib/python2.7/site-packages/memcache.py", line 998, in _val_to_store_info
pickler.dump(val)
MemoryError
有人可能能够帮助你,如果你真的显示你如何使用memcached!但请注意,它不是用来容纳非常大的物体。尽管可以增加默认的最大对象大小1MB。 – e4c5