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IO Problems [message #48122] Thu, 27 September 2012 18:13
jordanmoreira57 is currently offline  jordanmoreira57
Messages: 1
Registered: September 2012
Location: Brasil
Junior Member
Hello for all..

I ever got IO problems with OpenVZ, and this is very difficult to see what's really killing your server.

For an example, today, my server load raised to about 200:
01:40:01 PM 12 3337 156.16 134.98 84.33
01:50:01 PM 13 3392 166.27 162.10 122.29
02:00:01 PM 17 3356 222.48 213.78 166.39
02:10:01 PM 13 3150 193.64 193.30 176.32

I tried to get what's happening with top, atop -dD, free -m, vzmemusage, and another tools, but I can't, and when I was at the TOP, I saw a process: rm -rf

I killed this process and the server load lowered to 4~7.
02:40:01 PM 29 2364 4.38 7.10 44.34
02:50:01 PM 37 2526 7.93 6.68 26.26
03:00:01 PM 38 2404 5.21 6.10 16.73

I don't know what to do! Because a simple rm -rf basically killed my server, so, I don't think that this is good.

I saw too that the server swapped 600 kb while this, even if there were memory free.

See my free -m now:
total used free shared buffers cached
Mem: 32112 29653 2458 0 1884 18263
-/+ buffers/cache: 9505 22606
Swap: 3906 3 3902

This cached mem don't should be drop when the real mem really need?
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