Did you use G1GC ?
Thanks
-------- Original message --------From: John Yost <hokiege...@gmail.com> Date: 
11/8/17  5:48 AM  (GMT-08:00) To: users@kafka.apache.org Cc: ja...@scholz.cz 
Subject: Re: Kafka JVM heap limit 
In addition, in my experience, a memory heap > 8 GB leads to long GC pauses
which causes the ISR statuses to constantly change, leading to an unstable
cluster.

--John

On Wed, Nov 8, 2017 at 4:30 AM, chidigam . <bhanu.ki...@gmail.com> wrote:

> Meaning, already read the doc, but couldn't relate, having large Heap for
> JVM will not help
> Now it all make sense.
> Many thanks.
> Bhanu
>
> On Wed, Nov 8, 2017 at 2:34 PM, chidigam . <bhanu.ki...@gmail.com> wrote:
>
> > Hi Jakub,
> > Thank you very much. I have read this concept I/O cache in design
> section.
> > But couldn't connect the dots.
> >
> > Regards
> > Bhanu
> >
> > On Wed, Nov 8, 2017 at 2:10 PM, Jakub Scholz <ja...@scholz.cz> wrote:
> >
> >> This is probably because Kafka uses quite heavily the disk cache
> >> maintained
> >> by the operating system instead of storing messages in the JVM memory.
> So
> >> the requirements for the heap memory can be fairly small. The design
> >> section of the documentation describes the details:
> >> http://kafka.apache.org/documentation/#design
> >>
> >> Jakub
> >>
> >> On Wed, Nov 8, 2017 at 9:30 AM, chidigam . <bhanu.ki...@gmail.com>
> wrote:
> >>
> >> > Hi All,
> >> > I have basic question on Kafka JVM configuration, in most of forums I
> >> have
> >> > seen max heap as 8GB.  Why it is not recommended beyond that. Is there
> >> any
> >> > design limitation ?
> >> > Any help in this regards is highly appreciated.
> >> >
> >> > Regards
> >> > Bhanu
> >> >
> >>
> >
> >
>

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