jstat ref
2017-04-13 本文已影响13人
常胖
参考：https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jstat.html
常用命令
jstat -gcutil $(pgrep java) 3000 10
-gcutil option
Summary of garbage collection statistics.
- S0: Survivor space 0 utilization as a percentage of the space's current capacity.
- S1: Survivor space 1 utilization as a percentage of the space's current capacity.
- E: Eden space utilization as a percentage of the space's current capacity.
- O: Old space utilization as a percentage of the space's current capacity.
- M: Metaspace utilization as a percentage of the space's current capacity.
- CCS: Compressed class space utilization as a percentage.
- YGC: Number of young generation GC events.
- YGCT: Young generation garbage collection time.
- FGC: Number of full GC events.
- FGCT: Full garbage collection time.
- GCT: Total garbage collection time.
