Re: Some nodes has excessive GC Count compared to others

2020-09-02 Thread Oleksandr Shulgin
On Wed, Sep 2, 2020 at 7:54 PM Tobias Eriksson wrote: > Hi > > I am monitoring a 20+ node cluster, and 5 of them has an excessive GC > Count > > Typically the nodes has 40-60,000 GC runs, but a handful has 4,000,000 GC > runs > > And it is not temporary this is the same all the time, see diagram

Re: Some nodes has excessive GC Count compared to others

2020-09-02 Thread Shalom Sagges
I agree with Erick and believe it's most likely a hot partitions issue. I'd check "Compacted partition maximum bytes" in nodetool tablestats on those "affected" nodes and compare the result with the other nodes. I'd also check how the cpu_load is affected. From my experience, during excessive GC t

Re: Some nodes has excessive GC Count compared to others

2020-09-02 Thread Erick Ramirez
That would have been my first response too -- hot partitions. If you know the partition keys, you can quickly confirm it with nodetool getendpoints. Cheers! >

Re: CVE-2020-13946 Apache Cassandra RMI Rebind Vulnerability

2020-09-02 Thread Sam Tunnicliffe
Hi Manish, unfortunately I'm afraid, as far as I'm aware there is not. Thanks, Sam > On 2 Sep 2020, at 04:14, manish khandelwal > wrote: > > Hi Sam > > Is there any alternative to avoid this vulnerability? Like upgrade to > specific JVM version. > > Regards > Manish > > On Tue, Sep 1, 202