Yes, it gets parsed using entity(as[]) with spray-json support.  Under a
load test of say 1000 requests/second these latencies are not visible in
the percentiles - they are easy to see because this web server is getting
10-20 requests/second currently.  Trying to brainstorm if a dispatcher
needed to be tuned or something of that sort but have yet to see evidence
supporting that.

path("foos") {
traceName("FooSelection") {
entity(as[ExternalPageRequest]) { pr =>
val spr = toSelectionPageRequest(pr)
shouldTracePageId(spr.pageId).fold(
Tracer.currentContext.withNewSegment(s"Page-${pr.pageId}", "PageTrace", "
kamon") {
processPageRequestAndComplete(pr, spr)
},
processPageRequestAndComplete(pr, spr)
)
}
}

}

On Mon, Oct 23, 2017 at 4:42 PM, Viktor Klang <viktor.kl...@gmail.com>
wrote:

> And you consume the entityBytes I presume?
>
> On Mon, Oct 23, 2017 at 10:35 PM, Gary Malouf <malouf.g...@gmail.com>
> wrote:
>
>> It is from when I start the Kamon trace (just inside of my
>> path("myawesomepath") declaration until (theoretically) a 'complete' call
>> is made.
>>
>> path("myawesomepath") {
>>   traceName("CoolStory") {
>> ///do some stuff
>>  complete("This is great")
>> } }
>>
>> For what it's worth, this route is a 'POST' call.
>>
>> On Mon, Oct 23, 2017 at 4:30 PM, Viktor Klang <viktor.kl...@gmail.com>
>> wrote:
>>
>>> No, I mean, is it from first-byte-received to last-byte-sent or what?
>>>
>>> On Mon, Oct 23, 2017 at 10:22 PM, Gary Malouf <malouf.g...@gmail.com>
>>> wrote:
>>>
>>>> We are using percentiles computed via Kamon 0.6.8.  In a very low
>>>> request rate environment like this, it takes roughly 1 super slow
>>>> request/second to throw off the percentiles (which is what I think is
>>>> happening).
>>>>
>>>>
>>>>
>>>> On Mon, Oct 23, 2017 at 4:20 PM, Viktor Klang <viktor.kl...@gmail.com>
>>>> wrote:
>>>>
>>>>> What definition of latency are you using? (i.e. how is it derived)
>>>>>
>>>>> On Mon, Oct 23, 2017 at 10:11 PM, Gary Malouf <malouf.g...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi Konrad,
>>>>>>
>>>>>> Our real issue is that we can not reproduce the results.  The web
>>>>>> server we are having latency issues with is under peak load of 10-15
>>>>>> requests/second - obviously not much to deal with.
>>>>>>
>>>>>> When we use load tests (https://github.com/apigee/apib), it's easy
>>>>>> for us to throw a few thousand requests/second at it and get latencies in
>>>>>> the ~ 3 ms range.  We use kamon to track internal metrics - what we see 
>>>>>> is
>>>>>> that our 95th and 99th percentiles only look bad under the production
>>>>>> traffic but not under load tests.
>>>>>>
>>>>>> I've since used kamon to print out the actual requests trying to find
>>>>>> any pattern in them to hint at what's wrong in my own code, but they seem
>>>>>> to be completely random.  What we do know is that downgrading to spray 
>>>>>> gets
>>>>>> us 99.9th percentile latencies under 2ms, so something related to the
>>>>>> upgrade is allowing this.
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Gary
>>>>>>
>>>>>> On Tuesday, October 17, 2017 at 12:07:51 PM UTC-4, Konrad Malawski
>>>>>> wrote:
>>>>>>>
>>>>>>> Step 1 – don’t panic ;-)
>>>>>>> Step 2 – as I already asked for, please share actual details of the
>>>>>>> benchmarks. It is not good to discuss benchmarks without any insight 
>>>>>>> into
>>>>>>> what / how exactly you’re measuring.
>>>>>>>
>>>>>>> --
>>>>>>> Cheers,
>>>>>>> Konrad 'ktoso <http://kto.so>' Malawski
>>>>>>> Akka <http://akka.io/> @ Lightbend <http://lightbend.com/>
>>>>>>>
>>>>>>> On October 12, 2017 at 15:31:19, Gary Malouf (malou...@gmail.com)
>>>>>>> wrote:
>>>>>>>
>>>>>>> We have a web service that we just finished migrating from spray 1.3
>>>>>>> to Akka-Http 10.0.9.  While in most cases it is performing well, we are
>>>>>>> seeing terrible 99th percentile latencies 300-450ms range) starting 
>>>>>>> from a
>>>>>>> very low request rate (10/second) on an ec2 m3.large.
>>>>>>>
>>>>>>> Our service does not do anything complicated - it does a few Map
>>>>>>> lookups and returns a response to a request.  In spray, even 99th
>>>>>>> percentile latencies were on the order of 1-3 ms, so we are definitely
>>>>>>> concerned.  Connections as with many pixel-type servers are short-lived 
>>>>>>> ->
>>>>>>> we actually pass the Connection: Close header intentionally in our
>>>>>>> responses.
>>>>>>>
>>>>>>> Is there any obvious tuning that should be done on the server
>>>>>>> configuration that others have found?
>>>>>>> --
>>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>>>>>> urrent/additional/faq.html
>>>>>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>>>>>> p/akka-user
>>>>>>> ---
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>>>>>>>
>>>>>>> --
>>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>>>>> urrent/additional/faq.html
>>>>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>>>>> p/akka-user
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Cheers,
>>>>> √
>>>>>
>>>>> --
>>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>>>> urrent/additional/faq.html
>>>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>>>> p/akka-user
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>>>>>
>>>>
>>>> --
>>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>>> urrent/additional/faq.html
>>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>>> p/akka-user
>>>> ---
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>>>>
>>>
>>>
>>>
>>> --
>>> Cheers,
>>> √
>>>
>>> --
>>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>>> urrent/additional/faq.html
>>> >>>>>>>>>> Search the archives: https://groups.google.com/grou
>>> p/akka-user
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>>
>> --
>> >>>>>>>>>> Read the docs: http://akka.io/docs/
>> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/c
>> urrent/additional/faq.html
>> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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>>
>
>
>
> --
> Cheers,
> √
>
> --
> >>>>>>>>>> Read the docs: http://akka.io/docs/
> >>>>>>>>>> Check the FAQ: http://doc.akka.io/docs/akka/
> current/additional/faq.html
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-- 
>>>>>>>>>>      Read the docs: http://akka.io/docs/
>>>>>>>>>>      Check the FAQ: 
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>>      Search the archives: https://groups.google.com/group/akka-user
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