Have you tried to tweak settings like memtable_total_space_in_mb
Also, the compaction manager seems to
be pretty busy, take a look at in_memory_compaction_limit_in_mb.
And with SSD hardware you should modifiy
multithreaded_compaction, compaction_throughput_mb_per_sec, concurrent_reads
Of course 2GB of RAM is low but tweak
these settings might help you.
Maybe some guru could confirm/infirm
Jan Algermissen <firstname.lastname@example.org>
shuts down; was:Cassandra crashes
On 04.09.2013, at 11:11, Romain HARDOUIN <email@example.com>
> Maybe you should include the end of Cassandra logs.
There is nothing that seems interesting in cassandra.log. Below you find
> What comes to my mind when I read your first post is OOM killer.
> But what you describe later is not the case.
> Just to be sure, have you checked /var/log/messages?
Nothing there, just occasional Firewall TCP rejections.
Somehow I think I am simply overloading the whole cluster (see the hinted
handoff messages in the log). Could that be due to the limited memory of
2GB my nodes have? IOW, not enough space to buffer up the writes before
dumping to disk?
Also, my overall write performance is actually pretty bad compared to what
I read about C*. Before I thought it was the client doing to much work
or the network. Turns out that's not the case.
I'd expect C* to sort of just suck in my rather small amount of data -
must be me, not using the right configuration. Oh well, I'll get there
:-) Thanks anyhow.