cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ben G <guobin.em...@gmail.com>
Subject Re: Cassandra node JVM hang during node repair a table with materialized view
Date Thu, 16 Apr 2020 07:32:08 GMT
Thanks a lot. We are working on removing views and control the partition
size.  I hope the improvements help us

Best regards

Gb

Erick Ramirez <erick.ramirez@datastax.com> 于2020年4月16日周四 下午2:08写道:

> GC collector is G1.  I ever repair the node after scale up. The JVM issue
>> reproduced.  Can I increase the heap to 40 GB on a 64GB VM?
>>
>
> I wouldn't recommend going beyond 31GB on G1. It will be diminishing
> returns as I mentioned before.
>
> Do you think the issue is related to materialized view or big partition?
>>
>
> Yes, materialised views are problematic and I don't recommend them for
> production since they're still experimental. But if I were to guess, I'd
> say your problem is more an issue with large partitions and too many
> tombstones both putting pressure on the heap.
>
> The thing is if you can't bootstrap because you're running into the
> TombstoneOverwhelmException (I'm guessing), I can't see how you wouldn't
> run into it with repairs. In any case, try running repairs on the smaller
> tables first and work on the remaining tables one-by-one. But bootstrapping
> a node with repairs is a very expensive exercise than just plain old
> bootstrap. I get that you're in a tough spot right now so good luck!
>


-- 

Thanks
Guo Bin

Mime
View raw message