[CentOS] (no subject)

Hey,

  kernel: rsync invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0, oom_score_adj=0
  ...
  kernel: Out of memory: Kill process 27974 (mysqld) score 361 or sacrifice child
  kernel: Killed process 27974, UID 27, (mysqld) total-vm:3804672kB, anon-rss:2890828kB, file-rss:3324kB

rsync whines he wants more RAM and... mysql gets killed...
That makes me a bit sad!
And from my nagios graphs, at that time, ram usage was only 75% (4.5GB/6GB) and swap usage 0.3% (/2GB)!
I cannot believe an rsync suddenly needed 1.5GB+2GB and was not satisfied...
And even after the out of memory, the graphs show no swap usage change at all.
Anybody would have an idea about this "fake" out of memory?

Thx,
JD