2.0.5 housekeeper with oracle is always 100% busy - days+ ! and newer drops back to 0%
Small part of housekeeper strace with 2.0.5 you can see here http://pastebin.com/9tERRGUE
After one week with 2.0.5 I downgraded to 2.0.4 and it solved the problem immediately.
Last day housekeeper deletes 4 times more records as usually (there is special code for this).
Today morning I tried 2.0.5 sources BUT without changes from
ZBX-5920 (thanks dimir for preparing tar.gz)
And housekeeper is working as it should !
So I suppose the
ZBX-5920 introduced some side effect for housekeeper on Oracle.