http://www.slideshare.net/brendangregg/velocity-2015-linux-perf-tools/105 лек
Then the doctor starts calling you up first thing every morning at 8 a.m. to say I just want to remind you that you have a terrible disease. Around the 10th call you stop answering the phone, no matter how awful you feel.
The https://bnw.im is like a doctor who tells you you have a terrible disease — and when you ask what the treatment is, says I have absolutely no idea.