vm.swappiness ?

Jared Morrow jared at basho.com
Wed Oct 16 17:05:50 EDT 2013


It is checked by 'riak-admin diag' if you run that to check your system.

-Jared




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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