You probably need to configure ulimits correctly <http://docs.datastax.com/en/cassandra/2.0/cassandra/install/installRecommendSettings.html> .
What does this give you? /proc/<cassandra PID>/limits All the best, [image: datastax_logo.png] <http://www.datastax.com/> Sebastián Estévez Solutions Architect | 954 905 8615 | sebastian.este...@datastax.com [image: linkedin.png] <https://www.linkedin.com/company/datastax> [image: facebook.png] <https://www.facebook.com/datastax> [image: twitter.png] <https://twitter.com/datastax> [image: g+.png] <https://plus.google.com/+Datastax/about> <http://feeds.feedburner.com/datastax> <http://goog_410786983> <http://www.datastax.com/gartner-magic-quadrant-odbms> DataStax is the fastest, most scalable distributed database technology, delivering Apache Cassandra to the world’s most innovative enterprises. Datastax is built to be agile, always-on, and predictably scalable to any size. With more than 500 customers in 45 countries, DataStax is the database technology and transactional backbone of choice for the worlds most innovative companies such as Netflix, Adobe, Intuit, and eBay. On Fri, Nov 6, 2015 at 1:56 PM, Branton Davis <branton.da...@spanning.com> wrote: > We recently went down the rabbit hole of trying to understand the output > of lsof. lsof -n has a lot of duplicates (files opened by multiple > threads). Use 'lsof -p $PID' or 'lsof -u cassandra' instead. > > On Fri, Nov 6, 2015 at 12:49 PM, Bryan Cheng <br...@blockcypher.com> > wrote: > >> Is your compaction progressing as expected? If not, this may cause an >> excessive number of tiny db files. Had a node refuse to start recently >> because of this, had to temporarily remove limits on that process. >> >> On Fri, Nov 6, 2015 at 10:09 AM, Jason Lewis <jle...@packetnexus.com> >> wrote: >> >>> I'm getting too many open files errors and I'm wondering what the >>> cause may be. >>> >>> lsof -n | grep java show 1.4M files >>> >>> ~90k are inodes >>> ~70k are pipes >>> ~500k are cassandra services in /usr >>> ~700K are the data files. >>> >>> What might be causing so many files to be open? >>> >>> jas >>> >> >> >
