I'm having a bit of a problem with Riak. When I keep my new documents to about
10 per second, Riak works fine. But as I increase my speed to about 100 docs
per second, Riak gets dramatically slow. After a while, the beam process takes
100% of my CPU and no longer responds to ping/stop or any other command from
the bin folder. I end up sending kill TERM to stop the process.
If I restart Riak, the bitcask backend seems to be limited to about 1-2
document stores per second, but read seems fairly responsive still. I'd
appreciate any thoughts or troubleshooting tips you may have. It's an
in-development database with demo data, so I can run any experiments you'd like
to see.
Thanks,
-Shane
Riak/riakOne% ./bin/riak-admin status
1-minute stats for 'r...@172.20.0.49'
-------------------------------------------
vnode gets : 104
vnode_puts : 103
vnode_gets_total : 136
vnode_puts_total : 127
node_gets : 36
node_gets_total : 47
node_get_fsm_time_mean : 2635.1111111111113
node_get_fsm_time_median : 667
node_get_fsm_time_95 : 9156
node_get_fsm_time_99 : 40652
node_get_fsm_time_100 : 40652
node_puts : 36
node_puts_total : 44
node_put_fsm_time_mean : 1670575.611111111
node_put_fsm_time_median : 1157
node_put_fsm_time_95 : 23900
node_put_fsm_time_99 : 60000511
node_put_fsm_time_100 : 60000511
cpu_nprocs : 0
cpu_avg1 : 0
cpu_avg5 : 0
cpu_avg15 : 0
mem_total : 0
mem_allocated : 0
disk : [{"none",0,0}]
nodename : 'r...@172.20.0.49'
connected_nodes : ['riak_maint_61...@172.20.0.49']
sys_driver_version : <<"1.5">>
sys_global_heaps_size : 0
sys_heap_type : private
sys_logical_processors : 2
sys_otp_release : <<"R13B04">>
sys_process_count : 167
sys_smp_support : true
sys_system_version : <<"Erlang R13B04 (erts-5.7.5) [source] [64-bit] [smp:2:2]
[rq:2] [async-threads:5] [hipe] [kernel-poll:true]\n">>
sys_system_architecture : <<"i386-apple-darwin9.4.0">>
sys_threads_enabled : true
sys_thread_pool_size : 5
sys_wordsize : 8
ring_members : ['r...@172.20.0.49']
ring_num_partitions : 64
ring_ownership : <<"[{'r...@172.20.0.49',64}]">>
ring_creation_size : 64
storage_backend : riak_kv_bitcask_backend
pbc_connects_total : 0
pbc_connects : 0
pbc_active : 0
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