Go GC Print out the information

This is a creation in Article, where the information may have evolved or changed.

Environment

The go version of this article is go1.8 linux/amd64.

Start the program

Set the environment variable Godebug, and then start the program. If the program is called proc, the start command is:
GODEBUG=gctrace=1 ./proc

GC Information

The GC prints the content like this:
gc 1 @0.045s 22%: 4.6+182+0.38 ms clock, 9.2+0/96/86+0.77 ms cpu, 52->52->52 MB, 53 MB goal, 2 P
The Information format for GC printing is probably as follows:
gc # @#s #%: #+...+# ms clock, #+...+# ms cpu, #->#-># MB, # MB goal, # P
The field has the following meanings:

    gc #        the GC number, incremented at each GC    @#s         time in seconds since program start    #%          percentage of time spent in GC since program start    #+...+#     wall-clock/CPU times for the phases of the GC    #->#-># MB  heap size at GC start, at GC end, and live heap    # MB goal   goal heap size    # P         number of processors used

Reference:

Http://stackoverflow.com/questions/20551748/decipher-golang-garbage-collection-output