I am not a Couchbase Server user (don’t even know what that is), but I am using RabbitMQ in a project and RabitMQ uses Erlang.
This morning, when I arrived at work, I found erl.exe running at 25% of the CPU even though there has been absolutely no use been made of RabbitMQ for many days (possibly weeks) now.
It just started again.memcached.exe is >90% continuously.
I downgraded the node from Azure A2 to A1.
Where you able to learn anything from the dump I sent you by email ?
I followed your suggestion and gracefully failed it. It takes ages to fail a node with 100% CPU. When finished, erl.exe CPU usage was ~15%. memcached.exe practically disappeared.
Node recovered. This should not occur
What should I do the next time ?
What should I do so that there will not be a next time ?
Was there a resolution to this issue? I’m facing the same thing on my Windows 2012 R2 Azure VM. The 2 processes, memcached and erl.exe. eat up 99% CPU with memcache spiking between 75% and 90% and erl.exe eating the remainder.
Hi @itay, 4.0 replaces 3.0 so you should upgrade when 4.0.0 is released. you will get improvements in performance by upgrading even if you are not using the new query language or indexing on the core data operations.
thanks
-cihan
yes RC0 that has been published this past monday already has the release candidate for community edition and enterprise edition - couchbase.com/downloads
-cihan
I’m a bit afraid of using RC. Is it stable and bug free ?
3.0.1 CE is really giving me a bad time so I want to make sure that I’m making the right decisions, as upgrading the DB is a delicate operation.
Will the full 4.0.0 version be released CE as well ? Is there a time frame ?
Will 3.0.3 be CE soon ?
Is there a page where you publish your versions road map ?
Hi @itay, The timeline for 4.0 CE is early Oct. 4.0 includes all fixes in 3.0.3 version so I would recommend 4.0 CE when we are generally available. RC0 is not the finished version so we still have a few fixes we are adding before the targeted oct date.
thanks
-cihan
Before migrating from 3.0.1 CE to 4.0.0 CE, where can I find a guide, manual, walkthru on how to do it correctly and successfully for the first time, on a running cluster ?
Hi @itay, pls rehearse on another cluster first to make sure things work well. Also review the known issues list to ensure there isn’t anything that would impact your specific case.
You can find the upgrade manual here.
There are 3 upgrade strategies listed on the page and all 3 strategies mentioned here will work with CE.
Thanks
-cihan