1.4.8, memory_backend max_memory not honored?

Christian Dahlqvist christian at basho.com
Tue Jun 24 13:27:05 EDT 2014


Hi Allen,

Apart from the memory backend, AAE will also be consuming memory as you
currently have it enabled. I would recommend running the test again with
anti entropy turned off to see how much impact that has.

Best regards,

Christian





On Tue, Jun 24, 2014 at 5:29 PM, Allen Landsidel <landsidel.allen at gmail.com>
wrote:

> Sure Luke.
>
> The app.config is attached.
>
> Does that riak_kv/940 sound like it could be responsible?
>
>
> On 6/24/2014 12:15, Luke Bakken wrote:
>
>> Hi Allen,
>>
>> There were some fixes to the memory backend in 1.4.9:
>> https://github.com/basho/riak/blob/1.4/RELEASE-NOTES.md
>>
>> Could you please provide your app.config file? I'd like to check it and
>> test out your scenario locally.
>>
>> --
>> Luke Bakken
>> CSE
>> lbakken at basho.com <mailto:lbakken at basho.com>
>>
>>
>>
>> On Tue, Jun 24, 2014 at 8:59 AM, Allen Landsidel
>> <landsidel.allen at gmail.com <mailto:landsidel.allen at gmail.com>> wrote:
>>
>>     Test cluster with 2 machines running 1.4.8 with the memory backend.
>>     app_config has ring_creation_size 64, max_memory 4.  If I understand
>>     the documentation correctly this should result in a maximum memory
>>     footprint (minus overhead) of 256M.  Each node has 2G RAM, 2G of
>>     swap.  After running for a while constantly adding data, without
>>     ever explicitly removing any, the memory footprint outstrips
>>     physical ram and will eventually consume all available swap space
>>     and be killed.
>>
>>     Is this a known issue in 1.4.8 that's fixed in 1.4.9, or is there
>>     other configuration settings that need adjusted to reduce the
>> footprint?
>>
>>     Initially I had set it up to top out at 1GB but when it started
>>     exhausting swap, I progressively reduced max_memory until I arrived
>>     where I am now, with no difference at all.
>>
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>>
>>
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