Maybe it has got something to do with "swapiness", it's something you can configure, more info here: https://www.linux.com/news/software/applications/8208-all-about-linux-swap-space
2012/4/14 ruslan usifov <ruslan.usi...@gmail.com> > I know:-) but this is not answer:-(. I found that on other nodes there > still about 3GB (on node with JAVA_HEAP=6GB free memory also 3GB) of free > memory but there JAVA_HEAP=5G, so this looks like some sysctl > (/proc/sys/vm???) ratio (about 10%(3 / 24 * 100)), i don't known which, > anybody can explain this situation???? > > 2012/4/14 R. Verlangen <ro...@us2.nl> > > Its recommended to disable swap entirely when you run Cassandra on a >> server. >> >> >> 2012/4/14 ruslan usifov <ruslan.usi...@gmail.com> >> >>> I forgot to say that system have 24GB of phis memory >>> >>> >>> 2012/4/14 ruslan usifov <ruslan.usi...@gmail.com> >>> >>>> Hello >>>> >>>> We have 6 node cluster (cassandra 0.8.10). On one node i increase java >>>> heap size to 6GB, and now at this node begin grows swap, but system have >>>> about 3GB of free memory: >>>> >>>> >>>> root@6wd003:~# free >>>> total used free shared buffers >>>> cached >>>> Mem: 24733664 21702812 3030852 0 6792 >>>> 13794724 >>>> -/+ buffers/cache: 7901296 16832368 >>>> Swap: 1998840 2352 1996488 >>>> >>>> >>>> And swap space slowly grows, but i misunderstand why? >>>> >>>> >>>> PS: We have JNA mlock, and set vm.swappiness = 0 >>>> PS: OS ubuntu 10.0.4(2.6.32-40-generic) >>>> >>>> >>>> >>> >> >> >> -- >> With kind regards, >> >> Robin Verlangen >> www.robinverlangen.nl >> >> > -- With kind regards, Robin Verlangen www.robinverlangen.nl
