This week, I’ve been mostly optimizing a service. This service is written in Java. When there is not much traffic in the production environment, there is also a call batch timeout. And when the timeout is sent, the CPU usage is very low. After observing this, the CPU usage never went up. At this point, it was speculated that the threads were all blocking on some operation, causing the problem. ...
This is the first of my periodic reviews that has a technical problem I’ve encountered at work, so this installment is mostly a summary of experiences over time, to get a head start on future technical reviews. I’ve been working at the company for almost six months now, and I recently switched from client-side development to backend development. This is what I wish, but actually not what I asked for. Because I personally feel that in the current career plan of China’s tech industry, backend developers can explore slightly more things, and the scale of exposure to problems will be much larger. ...