Errors messages from 2i/range queries, or something else?

Russell Brown russell.brown at mac.com
Fri May 30 05:33:45 EDT 2014


How large is your max_results size for 2i queries, or, if you’re not using pagination, what do you estimate the result size is?

Do you require sorted results? If you don’t, and you’re not using pagination, 1.4.8 might solve your issues since it doesn’t buffer and sort results in memory (see Sorting under http://docs.basho.com/riak/1.4.8/dev/using/2i/#Querying)

Cheers

Russell

On 30 May 2014, at 10:27, Dave Brady <dbrady at weborama.com> wrote:

> Our five-node cluster, running 1.4.7, is spewing lots of these messages:
> 
> 2014-05-30 08:49:20.683 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.8208.361> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,rmerge3_21_3,6}},{message_queue_len,0}] [{timeout,155},{old_heap_block_size,0},{heap_block_size,317811},{mbuf_size,0},{stack_size,59},{old_heap_size,0},{heap_size,271310}]
> 2014-05-30 08:52:30.532 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.17361.375> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,rmerge2_1,4}},{message_queue_len,0}] [{timeout,103},{old_heap_block_size,0},{heap_block_size,514229},{mbuf_size,0},{stack_size,59},{old_heap_size,0},{heap_size,252851}]
> 2014-05-30 08:52:31.123 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.17361.375> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,rmerge2_2,5}},{message_queue_len,0}] [{timeout,103},{old_heap_block_size,0},{heap_block_size,514229},{mbuf_size,0},{stack_size,58},{old_heap_size,0},{heap_size,251111}]
> 2014-05-30 08:52:37.041 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.29376.375> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,split_1_1,6}},{message_queue_len,0}] [{timeout,103},{old_heap_block_size,0},{heap_block_size,196418},{mbuf_size,0},{stack_size,56},{old_heap_size,0},{heap_size,190521}]
> 2014-05-30 08:52:37.149 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.29376.375> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,split_1,5}},{message_queue_len,0}] [{timeout,101},{old_heap_block_size,0},{heap_block_size,317811},{mbuf_size,0},{stack_size,56},{old_heap_size,0},{heap_size,196361}]
> 2014-05-30 08:52:37.977 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.29376.375> [{initial_call,{erlang,apply,2}},{almost_current_function,{lists,rmerge3_21_3,6}},{message_queue_len,0}] [{timeout,123},{old_heap_block_size,0},{heap_block_size,514229},{mbuf_size,0},{stack_size,59},{old_heap_size,0},{heap_size,251541}]
> 2014-05-30 09:02:00.731 [info] <0.83.0>@riak_core_sysmon_handler:handle_event:92 monitor long_gc <0.16282.433> [{initial_call,{erlang,apply,2}},{almost_current_function,{erlang,max,2}},{message_queue_len,0}] [{timeout,103},{old_heap_block_size,0},{heap_block_size,196418},{mbuf_size,0},{stack_size,65},{old_heap_size,0},{heap_size,125642}]
> 
> GET and PUT times are shooting into multi-second response.
> 
> Can someone give me any hints about where to look, please?
> 
> --
> Dave Brady
> 
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