About the log class in Go

After you create a new log file, run three threads:

1, responsible for timing check whether the file exists, if it does not exist, re-create, and clear the expired log

2. Change the name of the file and add the date after the original name.

3. Flush the cache contents to the log regularly

When calling functions such as log Errorf:

1. Determine if the log level is within the configured range

2, with runtime. Caller get the function call stack, get the file that runs the current command, the row, and other information

3. Create a buffer to temporarily store string log information

4. Write the buffer contents to a file

5, if the buffer is very large, then do not do processing, to the garbage collection mechanism; If buffer is small, save it and continue with it the next time. Increase the utilization of system resources.