Re: [Quickfixj-users] Losing time between fromApp calls

[Florian L. <fl...@un...>]

Thanks for the reply. Actually the messages arrive very quickly 
(thousands inside one second) which I can see because the Slf4jLogger 
logs them immediately to my console. It's just the fromApp() method 
calls that seem to be delayed with this 20ms gap. And btw. it's not 
always exactly 20ms, it varies between 15-30ms, I just picked a nice 
example with consistent spacing between the method calls. So I don't 
really know what's happening in between since I don't know what code is 
running in this gap and therefore I can't add log statements there.

On 10.09.2020 18:05, Colin DuPlantis wrote:
> QuickFIX/J Documentation: http://www.quickfixj.org/documentation/
> QuickFIX/J Support: http://www.quickfixj.org/support/
>
>
> We regularly process over 1000 messages/s, so I don't think this is 
> some integral limitation to qfj.
>
> If it were me, I would use a profiling tool like Oracle JMC or the 
> like to see what's taking the most cycles.
>
> At a guess, I would be suspicious of whatever it is that's sending the 
> messages. It's such a regular interval that I wonder if your source 
> isn't sending messages fast enough.
>
> In my experience, the network side of qfj takes microseconds to handle 
> a message.
>
> On 9/10/20 1:33 AM, Florian Leu wrote:
>> QuickFIX/J Documentation: http://www.quickfixj.org/documentation/
>> QuickFIX/J Support: http://www.quickfixj.org/support/
>>
>>
>> Hi everyone
>>
>> I'm a new user of Quickfix/j and so far the implementation is going 
>> well, but now that I started performance testing I realized that it 
>> isn't my code in the fromApp calls that is losing time, but it's 
>> actually that between every fromApp call I'm losing around 20ms, 
>> which limits my throughput to under 50msg/s. I see this by logging at 
>> the beginning and at the end of every fromApp call, which shows 
>> clearly that the time is lost between the calls and not during the 
>> method execution. Can anyone tell me what I might be doing wrong or 
>> how I can get Quickfix/j not to pause for 20ms between consecutive 
>> fromApp calls, but follow one fromApp call immediately after the last 
>> has terminated? Or is there any way to parallelize the fromApp calls 
>> (even though the messages all arrive via the same session)?
>>
>> 2020-09-10 09:00:33.210  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : startFromApp
>> 2020-09-10 09:00:33.210  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : endFromApp
>> 2020-09-10 09:00:33.230  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : startFromApp
>> 2020-09-10 09:00:33.230  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : endFromApp
>> 2020-09-10 09:00:33.250  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : startFromApp
>> 2020-09-10 09:00:33.250  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : endFromApp
>> 2020-09-10 09:00:33.270  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : startFromApp
>> 2020-09-10 09:00:33.270  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : endFromApp
>> 2020-09-10 09:00:33.290  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : startFromApp
>> 2020-09-10 09:00:33.290  INFO 12184 --- [QFJ Message Processor] 
>> MyApp    : endFromApp
>>
>> Thanks for your help and best regards,
>> Florian
>>
>>
>>
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