Memory consumption exceeds Memory Quota allocated for a bucket

Memory consumption exceeds Memory Quota allocated for a bucket

Jenkins Link:
http://qa.sc.couchbase.com/view/3.0.0/job/ubuntu_x64--47_01--connection-P1/24/console

Test to Reproduce:
./testrunner -i /tmp/connections-tests.ini get-logs=True,wait_timeout=180,get-cbcollect-info=True -t memorysanitytests.MemorySanity.memory_quota_default_bucket,dgm_run=true

Steps to Reproduce:
1. Create a bucket of any size like 256M
2. Load data enough to create a DGM
3. Check the "tc_malloc_allocated" stat is within 256M bound

[2014-04-10 23:48:34,023] - [memorysanitytests:100] INFO - Resident ratio is 38
[2014-04-10 23:48:34,048] - [memorysanitytests:102] INFO - total_allocated_bytes is 287

FAIL: memory_quota_default_bucket (memorysanitytests.MemorySanity)
----------------------------------------------------------------------
Traceback (most recent call last):
File "pytests/memorysanitytests.py", line 104, in memory_quota_default_bucket
memory_mb, self.quota))
AssertionError: total_allocated_bytes 287 should be within 256

----------------------------------------------------------------------

Errors in between:
[2014-04-10 23:44:13,224] - [data_helper:1020] ERROR - ["Memcached error #134 'Temporary failure': Temporary failure for vbucket :769 to mc 172.23.107.27:11210"]
Traceback (most recent call last):
File "lib/memcached/helper/data_helper.py", line 1056, in _setMulti_rec
rec_caller_fn(exp, flags, keyval, pause, timeout - pause) # Start all over again for these key vals.
File "lib/memcached/helper/data_helper.py", line 1018, in _setMulti_seq
errors = self._setMulti_rec(mc, exp, flags, keyval, pause_sec, timeout_sec, self._setMulti_seq)
File "lib/memcached/helper/data_helper.py", line 1075, in _setMulti_rec
rec_caller_fn(exp, flags, keyval, pause, timeout - pause) # Please refer above for comments.
File "lib/memcached/helper/data_helper.py", line 1018, in _setMulti_seq
errors = self._setMulti_rec(mc, exp, flags, keyval, pause_sec, timeout_sec, self._setMulti_seq)
File "lib/memcached/helper/data_helper.py", line 1075, in _setMulti_rec
rec_caller_fn(exp, flags, keyval, pause, timeout - pause) # Please refer above for comments.
File "lib/memcached/helper/data_helper.py", line 1021, in _setMulti_seq
raise errors[0]
MemcachedError: Memcached error #134 'Temporary failure': Temporary failure for vbucket :769 to mc 172.23.107.27:11210

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