Thank you, Alain.
There was no frequent GC nor compaction so it have been a
mystery,however, once I stopped chef-client(we're managing the cluster
though chef-cookbook), the load was eased for almost all of the
servers.
so we're now refactoring our cookbook, in the meanwhile, we also
decided to re
Hi Aoi,
> since few weeks
> ago, all of the cluster nodes are hitting avg. 15-20 cpu load.
> These nodes are running on VMs(VMware vSphere) that have 8vcpu
> (1core/socket)-16 vRAM.(JVM options : -Xms8G -Xmx8G -Xmn800M)
I take my chance, a few ideas / questions below:
- What Cassandra versi
Hi Romain,
No, I don't think we upgraded cassandra version or changed any of
those schema elements. After I realized this high load issue, I found
that some of the tables have a shorter gc_grace_seconds(1day) than the
rest and because it seemed causing constant compaction cycles, I have
changed th
Did you upgrade from a previous version? DId you make some schema changes like
compaction strategy, compression, bloom filter, etc.?What about the R/W
requests? SharedPool Workers are... shared ;-) Put logs in debug to see some
examples of what services are using this pool (many actually).
Bes
Hi Patrick,
In fact I couldn't see any thread pool named "shared".
here is the result of tpstats from one of my nodes.
Pool NameActive Pending Completed Blocked
All time blocked
MutationStage 0 0 173237609 0
0
Might be more clear looking at nodetool tpstats
>From there you can see all the thread pools and if there are any blocks.
Could be something subtle like network.
On Tue, Jul 12, 2016 at 3:23 PM, Aoi Kadoya wrote:
> Hi,
>
> I am running 6 nodes vnode cluster with DSE 4.8.1, and since few weeks
>
Hi,
I am running 6 nodes vnode cluster with DSE 4.8.1, and since few weeks
ago, all of the cluster nodes are hitting avg. 15-20 cpu load.
These nodes are running on VMs(VMware vSphere) that have 8vcpu
(1core/socket)-16 vRAM.(JVM options : -Xms8G -Xmx8G -Xmn800M)
At first I thought this is because
