实行jps -ml输出如下：
然后实行jstack 2276,报出如下的缺点：
2276: Unable to open socket file: target process not responding or HotSpot VM not loadedThe -F option can be used when the target process is not responding2.办理
~ jstack 13179 | more2019-06-13 17:15:44Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.60-b23 mixed mode):"Attach Listener" #137 daemon prio=9 os_prio=0 tid=0x00002b7b64001000 nid=0x3db4 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE"Windows IOHub Watcher for IOHub#1: Selector[keys:0, gen:0] / Computer.threadPoolForRemoting [#4]" #90 daemon prio=5 os_prio=0 tid=0x00002b7bc00f7800 nid=0x340c in Object.wait() [0x00002b7c1c402000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.jenkinsci.remoting.protocol.IOHub$IOHubSelectorWatcher.run(IOHub.java:549) - locked <0x00000007a8e31928> (a java.lang.Object) at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28) at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)"IOHub#1: Selector[keys:0, gen:0] / Computer.threadPoolForRemoting [#3]" #89 daemon prio=5 os_prio=0 tid=0x00002b7bc00f6000 nid=0x340b runnable [0x00002b7c1cf0d000] java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method) at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)...........................然后再通过 jstat -gcutil pid 韶光间隔(ms) 查看 jc 信息
jstat -gcutil 13179 1000 S0 S1 E O M CCS YGC YGCT FGC FGCT GCT 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 99.95 0.00 49.14 14.96 91.97 84.24 10 0.444 3 0.317 0.761 .........
个中： S0：年轻代第一个幸存区（survivor）利用容量占用百分比
S1：年轻代第二个幸存区（survivor）利用容量占用百分比
E：年轻代伊甸园区（eden）利用容量占用百分比
O：老年代利用容量占用百分比
P：perm代利用容量占用百分比（JDK7-）
M：MetaSpace元空间利用容量占用百分比（JDK8+）
CCS：压缩利用比例
YGC：从运用程序启动到当前采样时年轻代gc的次数
YGCT：从运用程序启动到当前采样时年轻代gc的韶光
FGC：从运用程序启动到当前采样时老年代gc的次数
FGCT：从运用程序启动到当前采样时老年代gc的韶光
GCT：从运用程序启动到当前采样时gc总耗时
3.结论jstack须要利用与进程同等的用户才能实行
