I recently had to set up an integration testing environment that involves running multiple C* instances in containers using docker-compose. I am able to do so with a total memory for the container set at 512 MB and a 256 MB heap for C*. This is with C* 3.11.4. Going below 512 MB causes the container to get OOM killed consistently. I do not have any CPU limits or constraints currently set up. I am using out of the box settings for C* configuration. I am not doing much with the nodes other than starting them and allowing them to reach the UN state. I want to reiterate that this is for an automated testing environment that can be memory constrained.
On Sat, Mar 28, 2020 at 4:43 AM A <htt...@yahoo.com.invalid> wrote: > Thank you. > > > Sent from Yahoo Mail for iPhone > <https://overview.mail.yahoo.com/?.src=iOS> > > On Friday, March 27, 2020, 9:02 PM, Erick Ramirez < > erick.rami...@datastax.com> wrote: > > It really depends on your definition of "stable" but you can run C* on as > little as a single-core machine with 4-6GB of RAM. It will be stable enough > to do 1 or 2 queries per second (or maybe a bit more) if you were just > doing some development and wanted to do minimal testing. There are even > examples out there where users have clusters deployed on Raspberry Pis as a > fun project. > > But if you're talking about production deployments, the general > recommendation is to run it on at least 4 core machines + 16-20GB RAM if > you're just testing it out and only expect low traffic volumes. Otherwise, > it is recommended to deploy it on 8-core machines with at least 32-40GB RAM > so you have enough memory to allocate to the heap. Cheers! > > GOT QUESTIONS? Apache Cassandra experts from the community and DataStax > have answers! Share your expertise on https://community.datastax.com/. > > -- - John
