vm.swappiness ?

Alex Rice alex at mindlube.com
Thu Oct 17 11:09:48 EDT 2013


Aha! thanks for that tip


On Wed, Oct 16, 2013 at 3:05 PM, Jared Morrow <jared at basho.com> wrote:
> It is checked by 'riak-admin diag' if you run that to check your system.
>
> -Jared
>
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>
>
> On Wed, Oct 16, 2013 at 2:33 PM, Alex Rice <alex at mindlube.com> wrote:
>>
>> Thanks for confirming, Matthew! That might be a good check for the
>> startup script, much like I think it currently complains about ulimit
>> is not set to the Max.
>>
>> On Wed, Oct 16, 2013 at 2:31 PM, Matthew Von-Maszewski
>> <matthewv at basho.com> wrote:
>> > recommend value for Riak is zero.
>> >
>> > On Oct 16, 2013, at 4:28 PM, Alex Rice <alex at mindlube.com> wrote:
>> >
>> >> Just an informal poll- what is preferred for Linux vm.swappiness
>> >> setting for Riak in a *cloud* environment? The default is 60 - a lot
>> >> of stuff gets swapped out. This is good for OS disk cache.
>> >>
>> >> I am thinking vm.swappiness = 0
>> >>
>> >> - Avoid slow & potentially costly I/O operations in the virtualized
>> >> environment
>> >> - Make it easier to see if bitcask is running low of memory, as soon
>> >> as the Swap partition has been touched at all (1st out of memory
>> >> condition)
>> >> - Disk cache wont be as effective.
>> >> - I just like seeing Swap: 0% when I log in :0
>> >>
>> >> Does this setting even matter at all, practically speaking?
>> >>
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>> >
>>
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>
>




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