Yes, the leaders are currently speed evenly across five brokers. I also see the 
FetchRequestPurgatory.PurgatorySize to be peak as high as ~7.2M and the 
suddenly dropping to a couple hundred thousands. 
        
  

Thanks
Zakee



> On Mar 13, 2015, at 5:27 PM, Joel Koshy <jjkosh...@gmail.com> wrote:
> 
> Can you verify that the leaders are evenly spread? and if necessary
> run a preferred leader election?
> 
> On Fri, Mar 13, 2015 at 05:10:22PM -0700, Zakee wrote:
>> I have 35 topics spread with total 398 partitions (2 of them are supposed to 
>> be very high volume and so allocated 28 partitions to them, others vary 
>> between 5 to 14).
>> 
>> Thanks
>> Zakee
>> 
>> 
>> 
>>> On Mar 13, 2015, at 3:25 PM, Joel Koshy <jjkosh...@gmail.com> wrote:
>>> 
>>> I think what people have observed in the past is that increasing
>>> num-replica-fetcher-threads has diminishing returns fairly quickly.
>>> You may want to instead increase the number of partitions in the topic
>>> you are producing to. (How many do you have right now?)
>>> 
>>> On Fri, Mar 13, 2015 at 02:48:17PM -0700, Zakee wrote:
>>>> Hi Mayuresh,
>>>> 
>>>> I have currently set this property to 4 and I see from the logs that it 
>>>> starts 12 threads on each broker. I will try increasing it further.
>>>> 
>>>> Thanks
>>>> Zakee
>>>> 
>>>> 
>>>> 
>>>>> On Mar 13, 2015, at 11:53 AM, Mayuresh Gharat 
>>>>> <gharatmayures...@gmail.com> wrote:
>>>>> 
>>>>> You might want to increase the number of Replica Fetcher threads by 
>>>>> setting
>>>>> this property : *num.replica.fetchers*.
>>>>> 
>>>>> Thanks,
>>>>> 
>>>>> Mayuresh
>>>>> 
>>>>> On Thu, Mar 12, 2015 at 10:39 PM, Zakee <kzak...@netzero.net> wrote:
>>>>> 
>>>>>> With the producer throughput as large as > 150MB/s to 5 brokers on a
>>>>>> continuous basis, I see a consistently high value for Replica Max Lag (in
>>>>>> millions). Is this normal or there is a way to tune so as to reduce 
>>>>>> replica
>>>>>> MaxLag?
>>>>>> As per documentation, replica max lag (in messages) between follower and
>>>>>> leader replicas, should be less than replica.lag.max.messages (currently
>>>>>> set to 5000)
>>>>>> 
>>>>>> 
>>>>>> Thanks
>>>>>> Zakee
>>>>>> 
>>>>>> 
>>>>>> 
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>>>>> 
>>>>> 
>>>>> 
>>>>> -- 
>>>>> -Regards,
>>>>> Mayuresh R. Gharat
>>>>> (862) 250-7125
>>>>> ____________________________________________________________
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