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From Pradeep Chhetri <prad...@stashaway.com>
Subject Re: Upgrade from 2.1 to 3.11
Date Tue, 28 Aug 2018 08:31:51 GMT
You may want to try upgrading to 3.11.3 instead which has some memory leaks
fixes.

On Tue, Aug 28, 2018 at 9:59 AM, Mun Dega <mundega97@gmail.com> wrote:

> I am surprised that no one else ran into any issues with this version.  GC
> can't catch up fast enough and there is constant Full GC taking place.
>
> The result? unresponsive nodes makeing entire cluster unusable.
>
> Any insight on this issue from anyone that is using this version would be
> appreciated.
>
> Ma
>
> On Fri, Aug 24, 2018, 04:30 Mohamadreza Rostami <
> mohamadrezarostami2@gmail.com> wrote:
>
>> You have very large heap,it’s take most of  cpu time in GC stage.you
>> should in maximum set heap on 12GB and enable row cache to your cluster
>> become faster.
>>
>> On Friday, 24 August 2018, Mun Dega <mundega97@gmail.com> wrote:
>>
>>> 120G data
>>> 28G heap out of 48 on system
>>> 9 node cluster, RF3
>>>
>>>
>>> On Thu, Aug 23, 2018, 17:19 Mohamadreza Rostami <
>>> mohamadrezarostami2@gmail.com> wrote:
>>>
>>>> Hi,
>>>> How much data do you have? How much RAM do your servers have? How much
>>>> do you have a heep?
>>>> On Thu, Aug 23, 2018 at 10:14 PM Mun Dega <mundega97@gmail.com> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> We recently upgraded from Cassandra 2.1 to 3.11.2 on one cluster.  The
>>>>> process went OK including upgradesstable but we started to experience
high
>>>>> latency for r/w, occasional OOM and long GC pause after.
>>>>>
>>>>> For the same cluster with 2.1, we didn't have any issues like this. 
We
>>>>> also kept server specs, heap, all the same in post upgrade
>>>>>
>>>>> Has anyone else had similar issues going to 3.11 and what are the
>>>>> major changes that could have such a major setback in the new version?
>>>>>
>>>>> Ma Dega
>>>>>
>>>>

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