On 30 Dec 2014, at 11:16, Jason Ryan <jason.r...@trustev.com> wrote:

> Hi Russell,
> 
> Bucket Properties are:
> 
> young_vclock: 20
> w: quorum
> small_vclock: 50
> rw: quorum
> r: quorum
> pw: 0
> precommit: []
> pr: 0
> postcommit: []
> old_vclock: 86400
> notfound_ok: true
> n_val: 3
> linkfun: {modfun,riak_kv_wm_link_walker,mapreduce_linkfun}
> last_write_wins: true
> dw: quorum
> dvv_enabled: true

Interesting. So this is a default bucket on which you enabled DVV? Or a bucket 
type bucket (which has DVV enabled by default?)

> chash_keyfun: {riak_core_util,chash_std_keyfun}
> big_vclock: 50
> basic_quorum: false
> allow_mult: false
> active: true
> claimant: 'n1@10.2.4.5'
> 
> Jason
> 
>       
> Jason Ryan
> VP Engineering
> 
> Trustev
> Real Time, Online Identity Verification
>  
> email: jason.r...@trustev.com 
> skype: jason_j_ryan
> web: www.trustev.com
> 
> Trustev Ltd, 2100 Cork Airport Business Park, Cork, Ireland. 
> 
> On 30 December 2014 at 08:49, Russell Brown <russell.br...@me.com> wrote:
> Please can you let me know if you’re using a typed or default bucket?
> 
> Please can you let me know what you’re DVV setting is?
> 
> On 29 Dec 2014, at 12:27, Jason Ryan <jason.r...@trustev.com> wrote:
> 
>> Also we noticed these warnings - should we change the environment to make 
>> these on each node?
>> 
>> 2014-12-29 11:32:14.564 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.core.rmem_max is 124928, should be at least 8388608)
>> 2014-12-29 11:32:14.564 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.core.netdev_max_backlog is 1000, should be at least 10000)
>> 2014-12-29 11:32:14.564 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.core.somaxconn is 128, should be at least 40000)
>> 2014-12-29 11:32:14.564 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.ipv4.tcp_max_syn_backlog is 2048, should be at least 40000)
>> 2014-12-29 11:32:14.565 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.ipv4.tcp_fin_timeout is 60, should be no more than 15)
>> 2014-12-29 11:32:14.565 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.ipv4.tcp_keepalive_intvl is 75
>> , should be no more than 30)
>> 2014-12-29 11:32:14.565 [warning] <0.339.0> riak_kv_env: sysctl 
>> net.ipv4.tcp_tw_reuse is 0, should be 1)
>> 2014-12-29 11:33:02.528 [warning] <10924.36.0> OS_MON (memsup) called by 
>> <10924.36.0>, not started
>> 2014-12-29 11:33:02.534 [warning] <10924.45.0> OS_MON (memsup) called by 
>> <10924.45.0>, not started
>> 
>> 
>> 
>> 
>> 
>> On 29 December 2014 at 12:08, Sargun Dhillon <sar...@sargun.me> wrote:
>> The bucket (type) that you're working with -- what are your
>> allow_mult, and last_write_wins settings?
>> 
>> On Mon, Dec 29, 2014 at 4:05 AM, Jason Ryan <jason.r...@trustev.com> wrote:
>> > It seems to move between 4 keys in particular, these keys are actually 
>> > empty
>> > at the moment (i.e. an empty JSON document).
>> >
>> > CPU utilization is close to zero.
>> >
>> > Can't see anything in particular, bar the error message I just posted
>> > before.
>> >
>> > Jason
>> >
>> >
>> > On 29 December 2014 at 11:58, Ciprian Manea <cipr...@basho.com> wrote:
>> >>
>> >> Hi Jason,
>> >>
>> >> Are these random timeouts happening for only one key, or is common for
>> >> more?
>> >>
>> >> What is the CPU utilisation in the cluster when you're experience these
>> >> timeouts?
>> >>
>> >> Can you spot anything peculiar in your server's $ dmesg outputs? Any I/O
>> >> errors there?
>> >>
>> >>
>> >> Regards,
>> >> Ciprian
>> >>
>> >> On Mon, Dec 29, 2014 at 1:55 PM, Sargun Dhillon <sar...@sargun.me> wrote:
>> >>>
>> >>> Several things:
>> >>> 1) I recommend you have a 5-node cluster:
>> >>> http://basho.com/why-your-riak-cluster-should-have-at-least-five-nodes/
>> >>> 2) What version of Riak are you using?
>> >>> 3) What backend(s) are you using?
>> >>> 4) What's the size of your keyspace?
>> >>> 5) Are you actively rewriting keys, or writing keys to the cluster?
>> >>> 6) Do you know how much I/O the cluster is currently doing?
>> >>>
>> >>> On Mon, Dec 29, 2014 at 2:51 AM, Jason Ryan <jason.r...@trustev.com>
>> >>> wrote:
>> >>> > Hi,
>> >>> >
>> >>> > We are getting random timeouts from our application (>60seconds) when
>> >>> > we try
>> >>> > to retrieve a key from our Riak cluster (4 nodes with a load balancer
>> >>> > in
>> >>> > front of them). Our application just uses the standard REST API to
>> >>> > query
>> >>> > Riak.
>> >>> >
>> >>> > We are pretty new to Riak - so would like to understand how best to
>> >>> > debug
>> >>> > this issue? Is there any good pointers on what to start with? This is
>> >>> > our
>> >>> > production cluster.
>> >>> >
>> >>> > Thanks,
>> >>> > Jason
>> >>> >
>> >>> >
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>> >>> >
>> >>> >
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>> 
>> This message is for the named person's use only. If you received this 
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> 
> 
> 
> This message is for the named person's use only. If you received this message 
> in error, please immediately delete it and all copies and notify the sender. 
> You must not, directly or indirectly, use, disclose, distribute, print, or 
> copy any part of this message if you are not the intended recipient. Any 
> views expressed in this message are those of the individual sender and not 
> Trustev Ltd. Trustev is registered in Ireland No. 516425 and trades from 2100 
> Cork Airport Business Park, Cork, Ireland.
> 

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