Hi all,
I am using snapraid, a software like raid system, for a long time now. It uses some decent amount of RAM to do it’s work which it did fine for almost a year. From one day to the other it stopped working (related to an turris os update? I don’t know). I posted at the snapraid forum to ask for help and they tracked down the problem to not having enough memory: https://sourceforge.net/p/snapraid/discussion/1677233/thread/4ed13e54/?limit=25
However, I restarted turris and there are 1.4 GBs available (more than enough for 700mb which snapraid needs). Running free also tells me that there is enough RAM available:
root@turris:~# free
total used free shared buffers cached
Mem: 2070768 632748 1438020 43080 1956 74832
-/+ buffers/cache: 555960 1514808
Swap: 0 0 0
Running strace shows that this is the last call made by snapraid:
mmap2(NULL, 46112768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x9eae1000
After that, snapraid loops with 100% cpu for hours and never terminates.
Why is mmap2 returning 2.6GB as RAM available?
Do you guys have any idea what happend? Since I am using the same tool for months without any problems I can not really believe that the problem is caused by it.
Thank you for help.
Thanks.