Hi, Cassandra issues an mlockall [1] before mmap-ing sstables to prevent the kernel from paging out heap space in favor of memory-mapped sstables. I was wondering, what happens to the off-heap row cache (saved or unsaved)? Is it possible that the kernel pages out off-heap row cache in favor of resident mmap-ed sstable pages?
Thanks, Omid [1] http://pubs.opengroup.org/onlinepubs/007908799/xsh/mlockall.html
