http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/CPU-Cores-of-JobManager-tp17022p17054.html
> Which version of Fllink are you using?
>
> Is the high CPU usage caused by the browser or the JVM?
>
> One thing we should investigate is how many requests the UI sends to the
> JobManager,
> but I don't know of a good way to do that without modifying the source.
>
> On 06.12.2017 01:20, Yuta Morisawa wrote:
>> Hi Timo
>>
>> I execute streaming job without checkpointing and I don't configure
>> any state backend, so it may be "MemoryStateBackend".
>>
>> Actually, my streaming app just reads data from kafka and writes it to
>> an external DB. Its not so complicated.
>>
>> Regards,
>> Yuta
>>
>> On 2017/12/05 19:55, Timo Walther wrote:
>>> I had some profiling tool like jvisualvm in mind. Are you executing
>>> streaming or batch jobs? If streaming, is checkpointing enabled and
>>> which type of statebackend?
>>>
>>> @Chesnay do you have experience with slow behavior of the Web UI?
>>>
>>> Regards,
>>> Timo
>>>
>>>
>>> Am 12/5/17 um 10:37 AM schrieb Yuta Morisawa:
>>>> Hi Timo
>>>>
>>>> Thank you for your early reply.
>>>>
>>>> These are commands which I run my apps.
>>>> ./bin/yarn-session.sh -n 20 -jm 6000 -tm 24000 -s 10
>>>> ./bin/flink run -p 100 <jar1> <jar1 parameters>
>>>> ./bin/flink run -p 100 <jar2> <jar2 parameters>
>>>>
>>>> So, JobManager Heap Memory = 6000 MB and it manages 2 jobs.
>>>>
>>>> > Maybe you can use a profiler and find out which component consumes so
>>>> > much CPU resources?
>>>> You mean Java Flight Recorder or JITWatch?
>>>> Or, Flink has original profiler?
>>>>
https://ci.apache.org/projects/flink/flink-docs-release-1.3/monitoring/application_profiling.html
>>>>
>>>>
>>>> Regards,
>>>> Yuta
>>>>
>>>> On 2017/12/05 18:02, Timo Walther wrote:
>>>>> Hi Yuta,
>>>>>
>>>>> as far as I know you cannot assign more cores to a JobManager.
>>>>>
>>>>> Can you tell us a bit more about your environment? How many jobs
>>>>> does the JobManager has to manage? How much heap memory is assigned
>>>>> to the JobManager?
>>>>>
>>>>> Maybe you can use a profiler and find out which component consumes
>>>>> so much CPU resources?
>>>>>
>>>>> Regards,
>>>>> Timo
>>>>>
>>>>>
>>>>> Am 12/5/17 um 5:13 AM schrieb Yuta Morisawa:
>>>>>> Hi
>>>>>>
>>>>>> Now I am looking for the way to increase the number of allocated
>>>>>> CPU cores because my JobManagaer WEBUI is very heavy and sometimes
>>>>>> freeze.
>>>>>>
>>>>>> I think this is caused by the resource shortage of JobManager.
>>>>>> How can I increase the number of CPU for JobManager in YARN mode?
>>>>>>
>>>>>>
>>>>>>
>>>>>> Thanks
>>>>>> Yuta
>>>>>
>>>>>
>>>>>
>>>
>>>
>>
>>
>
>