Hi,
We have a 6 nodes riak cluster configured with 256 size. We are using
versions 1.4.8. Occasionally, we see the server return 503 response.
Looking at the log, it seems that we have a lot of warning about reading
large object and busy_dist_port. The majority of the objects are less than
2MB but we do have some large objects in the ranch of 5-15MB.
These are the two type of log entries we consistently see across all nodes
when that happen:
2015-03-04 17:53:48.149 [warning]
<0.1142.0>@riak_kv_vnode:do_get_object:1299 Reading large object of size
5498696 from...
2015-03-04 19:06:35.824 [info]
<0.95.0>@riak_core_sysmon_handler:handle_event:92 monitor busy_dist_port
<0.32259.1162>
[{initial_call,{riak_kv_get_fsm,init,1}},{almost_current_function,{gen_fsm,loop,7}},{message_queue_len,0}]
{#Port<0.3353>,'riak@servername...'}
The doc suggest increasing +zdbbl to deal with busy_dist_port. But does
anybody have any other suggestion to what other parameters I should look at
to improve the situation?
Thank you,
-Bora
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