[CentOS] memory cgroup max_usage_in_bytes question

Stijn De Weirdt
2018-04-05T06:53:24Z

hi rob,

>> can someone help explaining what we are seeing? it makes no sense to
us.
>> this is a host running centos 7.4 with 3.10.0-693.17.1 kernel, and it
>> has 192GB of ram
>>
>>> [] free -b
>>> ?????????????? total??????? used??????? free????? shared?
>>> buff/cache?? available
>>> Mem:??? 201402642432 14413479936 75642777600??? 48586752
111346384896
>>> 185689632768
>>> Swap:?? 21474832384??? 31961088 21442871296
>>> [] cat /sys/fs/cgroup/memory/memory.max_usage_in_bytes
>>> 273102151680
>> how can the max be so much higher than total, and this is not even
memsw?
> Binary K,M,G are 1024 multiples not 1000 so total seems a little low.
no, it's a bit lower than i expected, but it's the ususal
reserved/absent memory (dmesg|grep Memory)

and i mainly want to know why the max is higher than the limit.

stijn

>> either we're very tired and are overlooking something obvious, or
>> there's something new to be learned ;)
>>
>> many thanks,
>>
>> stijn
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