many connection ?
郝加来
From: Jason Lewis
Date: 2015-11-07 10:38
To: user@cassandra.apache.org
Subject: Re: Too many open files Cassandra 2.1.11.872
cat /proc/5980/limits
Limit Soft Limit Hard Limit Units
Max cpu time unlimited unlimited seconds
Max file size unlimited unlimited bytes
Max data size unlimited unlimited bytes
Max stack size 8388608 unlimited bytes
Max core file size 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 2063522 2063522 processes
Max open files 100000 100000 files
Max locked memory unlimited unlimited bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 2063522 2063522 signals
Max msgqueue size 819200 819200 bytes
Max nice priority 0 0
Max realtime priority 0 0
Max realtime timeout unlimited unlimited us
On Fri, Nov 6, 2015 at 4:01 PM, Sebastian Estevez
<sebastian.este...@datastax.com> wrote:
You probably need to configure ulimits correctly.
What does this give you?
/proc/<cassandra PID>/limits
All the best,
Sebastián Estévez
Solutions Architect | 954 905 8615 | sebastian.este...@datastax.com
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
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