Guido, So higher +zdbbl numbers will allow for larger message buffers, but at the expense of memory usage. We've actually added better wording in the default vm.args file for 1.4+ https://github.com/basho/riak/blob/master/rel/files/vm.args#L40
So I guess the best answer is trial & error. We added 32MB commented out in the vm.args, but it can go much higher than that (around 2gb is the true max). I think most people have found setting it to 32768 helps without too much memory usage penalty. -Jared On Mon, Jul 15, 2013 at 8:38 AM, Guido Medina <[email protected]>wrote: > Hi, > > We had an issue in 1.4 where 2i operations were timing out, after going > through support we were suggested to use "+zdbbl 16384", on the > "Configuring Riak Docs" it is strongly suggested (unless doc need to be > re-phrased) it should be higher: > > *Source:* > http://docs.basho.com/riakcs/latest/cookbooks/configuration/Configuring-Riak/ > > At the end of such doc there is the following fragment and we would like > to know if there is a kind of all situations balanced value and the > implications: > Performance & Capacity settings > > It is strongly recommended that the following values be set in the Riak > vm.args configuration file, which is located in the /etc/riak or > /opt/riak/etc folder. > > ## This setting is not present in default Riak installations, so## it should > be added. In some cases, a value of 128000 may be## appropriate. > +zdbbl 96000 > ## This setting is present in default Riak installations, so## its value > should be edited. > -env ERL_MAX_PORTS 16384 > > > > Kind regards, > > Guido. > > _______________________________________________ > riak-users mailing list > [email protected] > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > >
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