memcached - ServerError: error 10 from memcached_set: SERVER ERROR

[stargazer33]

When I want to view a product with a lot of product variants (about 1000) and caching with memcached is enabled I get this error:

[04/Jun/2013 14:59:31] ERROR [django.request:212] Internal Server Error: /shop/product/зигзаг-полотенцесушитель/
Traceback (most recent call last):
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/django/core/handlers/base.py", line 187, in get_response
    response = middleware_method(request, response)
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/mezzanine/core/middleware.py", line 134, in process_response
    response.add_post_render_callback(_cache_set)
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/django/template/response.py", line 92, in add_post_render_callback
    callback(self)
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/mezzanine/core/middleware.py", line 132, in 
    _cache_set = lambda r: cache_set(cache_key, r.content, timeout)
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/mezzanine/utils/cache.py", line 37, in cache_set
    return cache.set(_hashed_key(key), packed, real_timeout)
  File "/home/inox-t/.virtualenvs/prj_inox/lib/python2.6/site-packages/django/core/cache/backends/memcached.py", line 71, in set
    self._cache.set(key, value, self._get_memcache_timeout(timeout))
ServerError: error 10 from memcached_set: SERVER ERROR

here my cache settings:

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.PyLibMCCache',
        'LOCATION': '127.0.0.1:11211',
        "BINARY" : True,
        'OPTIONS': {  # Maps to pylibmc "behaviors"
            'tcp_nodelay': True,
            'ketama': True,           
        }
   }
}

PYLIBMC_MIN_COMPRESS_LEN=2048

I googled a bit about this error... it seems it is related to 1M limit of memcached value. I tried with PYLIBMC_MIN_COMPRESS_LEN set and without it, same results

[stargazer33]

OK, it seems, modifying the memcached argument -I helps. I set it to the value

-I 2M

At the moment it works, no error

[stargazer33]

Just checked the generated HTML size. It's about 1.5M. This explains why increasing memcached parameter helps.

Actually I just want these dropdown lists. At the the moment I use 7 dropdown lists for the product. It seems using these dropdown lists/options creates problems in cartridge (huge number of variations)

[stephenmcd]

I've no idea what approach will be best for you, but you may need to consider taking a step back and reconsidering a different approach to what you're doing. 1.5M of HTML isn't going to allow for a well functioning site.

[chrisspen]

@stargazer33, How do you set the -I memcached argument in CACHES? Does it go in OPTIONS? I'm having trouble finding any documentation for that in the python wrapper docs.