1.JMAP Jmap命令用于生成堆转储快照,有时候也成为heapdump或者dump文件。 Jmap不仅仅可以获取dump文件,还可以查询finalize执行队列,Java堆和永久代的详细信息,如空间使用率、当时用的是那种收集器等。 jmap -histo (to connect to running process and print histogram of java object heap jmap -dump: (to connect...
dump-options:live dump only live objects;ifnot specified,all objectsinthe heap are dumped.format=b binary format file=<file>dump heap to<file>Example:jmap-dump:live,format=b,file=heap.bin<pid>-Fforce.Usewith-dump:<dump-options><pid>or-histo to force a heap dump or histogram when<pid>...
file=<file> dump heap to <file> Example: jmap -dump:live,format=b,file=heap.bin <pid> -F force. Use with -dump:<dump-options> <pid> or -histo to force a heap dump or histogram when <pid> does not respond. The "live" suboption is not supported in this mode. -h | -help to...
-dump:<dump-options> to dump java heap in hprof binary format dump-options: live dump only live objects; if not specified,all objects in the heap are dumped. format=b binary format file=<file> dump heap to <file> Example:jmap-dump:live,format=b,file=heap.bin <pid> -F force. Use ...
Force. Use with jmap -dump or jmap -histo option if the pid does not respond. The live suboption is not supported in this mode. -h Prints a help message. -help Prints a help message. -J<flag> Passes <flag> to the Java virtual machine on which jmap is run. ...
dump-options: live dump only live objects; if not specified, all objects in the heap are dumped. format=b binary format file=<file> dump heap to <file> Example: jmap -dump:live,format=b,file=heap.bin <pid> -F force. Use with -dump:<dump-options> <pid> or -histo ...
查看 Mbean 的信息memory：查看 JVM 的内存信息ognl：执行 ognl 表达式perfcounter：查看当前 JVM 的 Perf Counter 信息sysenv：查看 JVM 的环境变量sysprop：查看和修改 JVM 的系统属性thread：查看当前 JVM 的线程堆栈信息vmoption：查看和修改 JVM 里诊断相关的 optionvmtool：从 jvm 里查询对象，执行 forceGc ...
-Ftoforceathreaddump.Usewhenjstack<pid>doesnotrespond(processishung) -mtoprintbothjavaandnativeframes(mixedmode) -llonglisting.Printsadditionalinformationaboutlocks -hor-helptoprintthishelpmessage </pid></remote></core></executable></pid></pid> ...
doe=y|n dump onexit? y msa=y|n Solaris micro state accounting n force=y|n force output to <file> y verbose=y|n print messages about dumps y 来几个官方指南上的实例。 CPU Usage Sampling Profiling(cpu=samples)的例子: java -agentlib:hprof=cpu=samples,interval=20,depth=3Hello ...
Options:-Ftoforce a thread dump.Usewhenjstack<pid>does notrespond(processishung)-mtoprint both javaandnativeframes(mixed mode)-l long listing.Prints additional information about locks-hor-helptoprintthishelp message 详细各项指标排查如下: CPU