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Sylvain Lebresne commented on CASSANDRA-8817:
---------------------------------------------
I don't think trying to guess some random minimal amount of memory required is
a good idea. The one thing here that I can agree we may want to look at is why
C* crashes without logging any error, assuming that this is indeed what
happened.
> Error handling in Cassandra logs in low memory scenarios could use improvement
> ------------------------------------------------------------------------------
>
> Key: CASSANDRA-8817
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8817
> Project: Cassandra
> Issue Type: Improvement
> Environment: Ubuntu 14.04, VM originally created with 1 GB RAM, DSE
> 4.6.0 installed
> Reporter: Michael DeHaan
> Priority: Minor
> Labels: lhf
> Fix For: 2.1.x
>
>
> When running Cassandra with a low amount of RAM, in this case, using DataStax
> Enterprise 4.6.0 in a reasonably default configuration, I find that I get an
> error after starting and trying to use nodetool, namely that it cannot
> connect to 127.0.0.1. Originally this sends me up a creek, looking for why
> Cassandra is not listening on 7199. The truth ends up being a bit more
> cryptic - that Cassandra isn't running.
> Upon looking at the Cassandra system logs, I see the last thing that it did
> was print out the (very long) class path. This confused me as basically I'm
> seeing no errors in the log at all.
> I am proposing that Cassandra should check the amount of available RAM and
> issue a warning in the log, or possibly an error, because in this scenario
> Cassandra is going to oomkill and probably could have predicted this in
> advance.
> Something like:
> "Found X MB of RAM, expecting at least Y MB of RAM, Z MB recommended, may
> crash, adjust <SETTINGS>" or something similar would be a possible solution.
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