Reaper 1.2 released

2018-07-24 Thread Jonathan Haddad
Hey folks, Just wanted to share with the list that after a bit of a long wait, we've released Reaper 1.2. We have a short blog post here outlining the new features: https://twitter.com/TheLastPickle/status/1021830663605870592 With each release we've worked on performance improvements and

Re: apache cassandra development process and future

2018-07-24 Thread Jeremy Hanna
For full disclosure, I've been in the Apache Cassandra community since 2010 and at DataStax since 2012. So DataStax moved on to focus on things for their customers, effectively putting most development effort into DataStax Enterprise. However, there have been a lot of fixes and improvements

Cassandra crashes after loading data with sstableloader

2018-07-24 Thread Arpan Khandelwal
I need to clone data from one keyspace to another keyspace. We do it by taking snapshot of keyspace1 and restoring in keyspace2 using sstableloader. Suppose we have following table with index on hash column. Table has around 10M rows. - CREATE TABLE message ( id uuid,

Re: concurrent_compactors via JMX

2018-07-24 Thread Alain RODRIGUEZ
Hello Ricardo, My understanding is that GP2 is better. I think we did some testing in the past, but I must say I do not remember the exact results. I remember we also thought of IO1 at some point, but we were not convinced by this kind of EBS (not sure if it was not as performant as suggested in

Re: Why and How is Cassandra using all my ram ?

2018-07-24 Thread Léo FERLIN SUTTON
On Tue, Jul 24, 2018 at 4:04 AM, Dennis Lovely wrote: > you define the max size of your heap (-Xmx), but you do not define the max > size of your offheap (MaxMetaspaceSize for jdk 8, PermSize for jdk7), so you > could occupy all of the memory on the instance. Yes I think we should set up a

Re: Why and How is Cassandra using all my ram ?

2018-07-24 Thread Léo FERLIN SUTTON
On Mon, Jul 23, 2018 at 11:44 PM, Mark Rose wrote: > Hi Léo, > > It's possible that glibc is creating too many memory arenas. Are you > setting/exporting MALLOC_ARENA_MAX to something sane before calling > the JVM? You can check that in /proc//environ. > I have checked and the MALLOC_ARENA_MAX