Re: LevelDB tuning questions.

[Matthew Von-Maszewski]

Guido, The attached spreadsheet is best for 1.4.  Not sure how I missed getting it posted to the web-site. Riak admin only reports memory usage as known by the Erlang virtual machine.  leveldb is outside Erlang's awareness. The best memory measurement on a Linux machine is the /proc/<process id>/status file.  I typically monitor the VmData value. Riak 1.4 greatly simplifies the memory management calculations compared to Riak 1.2/1.3.  But that does not mean it is easy.  The memory management for Riak 2.0 is completely changed.  You will only have to assign a total memory amount to be shared by all vnodes and leveldb will automatically split the memory wisely between the vnodes and each vnode's file cache and block cache … coming soon to a download near you ("soon" is measured in months). Matthew

leveldb_sizing_1.4.xls
Description: Binary data

On Sep 26, 2013, at 7:58 AM, Guido Medina <guido.med...@temetra.com> wrote: Hi, I'm trying to tune our Riak cluster using http://docs.basho.com/riak/latest/ops/advanced/backends/leveldb/#Parameter-Planning but I'm still lost on how to use the calculation results, here are my questions: Does this calculator https://github.com/basho/basho_docs/raw/master/source/data/LevelDB1.2MemModel_calculator.xls applies to Riak 1.4.2? How do I verify my running configuration? (I tried riak-admin status but somehow I can't relate the calculation with the obtained status, etc.) And finally, based on the calculator, how do I use the results, what pertinent variables am I supposed to set in app.config in the LevelDB section? Thanks, Guido. _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com

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