Random timeouts on Riak

Sargun Dhillon sargun at sargun.me
Mon Dec 29 07:08:15 EST 2014


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.ryan at 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 <ciprian at 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 <sargun at 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.ryan at 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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