Garbage collection using the Jstat analysis system __js

Jstat-gccause pid 1 per grid 1 ms output results
Jstat-gccause PID 2000 per grid 2 seconds output result

S0-heap on Survivor space 0% of the area that has been used

S1-heap on Survivor Space 1% of the area that has been used

Eden area on e-heap percentage of space already used

Percent of space used in old spaces on o-heap

Percentage of space used in P-perm area

ygc-number of young GC occurrences from application startup to sampling

ygct– time (in seconds) for young GC from application startup to sampling

fgc-number of full GC occurrences from application startup to sampling

fgct– time spent in full GC from application startup to sampling (in seconds)

gct-total time spent in garbage collection from application startup to sampling (in seconds)