Follow the white rabbit:
http://docs.basho.com/riak/latest/cookbooks/Linux-Performance-Tuning/
Most recommended parameters are on that link.
HTH,
Guido.
On 18/07/13 19:48, Simon Effenberg wrote:
Sounds like zdbbl.. I'm running 1.3.1 but it started after added 6 more
nodes to the previously 12 node cluster. So maybe it is because of a 18
node cluster?
I'll try the zdbbl stuff. Any other hint would be cool (if the new
kernel parameters are also good for 1.3.1.. could you provide them?).
Cheers
Simon
On Thu, 18 Jul 2013 19:34:18 +0100
Guido Medina <guido.med...@temetra.com> wrote:
If what you are describing is happening for 1.4, type riak-admin diag
and see the new recommended kernel parameters, also, on vm.args
uncomment the +zdbbl 32768 parameter, since what you are describing is
similar to what happened to us when we upgraded to 1.4.
HTH,
Guido.
On 18/07/13 19:21, Simon Effenberg wrote:
Hi @list,
I see sometimes logs talking about "hinted_handoff transfer of .. failed because of
TCP recv timeout".
Also riak-admin transfers shows me many handoffs (is it possible to give some insights about
"how many" handoffs happened through "riak-admin status"?).
- Is it a normal behavior to have up to 30 handoffs from/to different nodes?
- How can I get down to the problem with the TCP recv timeout? I'm not sure if
this is a network problem or if the other node is too slow. The load is ok on
the machines (some IOwait but not 100%). Maybe interfering with AAE?
Here the log information about the TCP recv timeout. But that is not that often
but handoffs happens really often:
2013-07-18 16:22:05.654 UTC [error]
<0.28933.14>@riak_core_handoff_sender:start_fold:216 hinted_handoff transfer of
riak_kv_vnode from 'riak@10.46.109.207'
1118962191081472546749696200048404186924073353216 to 'riak@10.46.109.205'
1118962191081472546749696200048404186924073353216 failed because of TCP recv timeout
2013-07-18 16:22:05.673 UTC [error]
<0.202.0>@riak_core_handoff_manager:handle_info:282 An outbound handoff of
partition riak_kv_vnode 1118962191081472546749696200048404186924073353216 was
terminated for reason: {shutdown,timeout}
Thanks in advance
Simon
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