> I have not looked into smaps before. But it actually seems odd that that > mmaped Index files are taking up so *little memory*. Are they only a > few kb on disk?
The sum of the sizes of all *-Index.db files in /var/lib/cassandra is 2924kb. > Is this a snapshot taken shortly after the process > started or before the OOM killer is presumably about to come along. It was taken after a day of considerable write load. > How long does it take to go from 1.1 G to 2.1 G resident? Two days of active use with considerable write load. > Either way, it > would be worthwhile to set one node to standard io to make sure it's > really not mmap causing the problem. Will do that. I am currently a/b testing OpenJDK vs. Sun/Oracle JDK. Next test will be for standard vs. auto. > Anyway, assuming it's not mmap, here are the other similar threads on > the topic. Unfortunately none of them claim an obvious solution: > > http://www.mail-archive.com/user@cassandra.apache.org/msg09279.html > http://www.mail-archive.com/user@cassandra.apache.org/msg08063.html > http://www.mail-archive.com/user@cassandra.apache.org/msg12036.html > http://mail.openjdk.java.net/pipermail/hotspot-dev/2011-April/004091.html > Thank you. I wasn't aware of these threads. Must have googled wrong.
