通过jmap可以查看到启动jvm时,java heap区的各个分配及使用情况: [root@emos-webdb bin]# ./jmap -heap 25109 Attaching to process ID 25109, please wait... Debugger attached successfully. Server compiler detected. JVM version is 24.79-b02 using thread-local object allocation. Parallel GC with 23 th...
使用命令【jmap -heap 进程号】 Attaching to process ID17656, please wait... Debugger attached successfully. Client compiler detected. JVM versionis25.73-b02usingthread-localobjectallocation. Mark Sweep Compact GC Heap Configuration: MinHeapFreeRatio=40MaxHeapFreeRatio=70MaxHeapSize=268435456(256.0MB) N...
51CTO博客已为您找到关于jmap -heap 命令详解的相关内容,包含IT学习相关文档代码介绍、相关教程视频课程,以及jmap -heap 命令详解问答内容。更多jmap -heap 命令详解相关解答可以来51CTO博客参与分享和学习,帮助广大IT技术人实现成长和进步。
1. jmap -heap pid 查看java 堆(heap)使用情况 using thread-local object allocation. Parallel GC with 4 thread(s) //GC 方式 Heap Configuration: //堆内存初始化配置 MinHeapFreeRatio=40 //相应jvm启动參数-XX:MinHeapFreeRatio设置JVM堆最小空暇比率(default 40) MaxHeapFreeRatio=70 //相应jvm启动參...
jmap是比较地道本土的堆分析工具,应该掌握,下面讲讲如何运用。 // 打印jvm的堆状况,主要是年轻代和老年代信息 jmap -heap <pid> 如: Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 536870912 (512.0MB) NewSize = 1310720 (1.25MB) MaxNewSize = 17592186044415 MB OldSize...
jmap -heap 1234 查看进程号为1234的Java程序的整个jvm内存状态 jmap -histo 1234 查找进程号为1234的java程序的jvm堆中对象详细占用情况 jmap -dump:format=b,file=/my.dump 1234 导出1234进程的java程序的整个JVM信息 jhat -J-Xmx1024M /my.dump, 启动web服务查看jmap导出的java程序的jvm信息。
https://www.eclipse.org/mat/downloads.php 解压之后双击MemoryAnalyzer.exe即可运行 打开刚才的heap.bin文件 可以看到下面有三个选项卡,包括可以执行的操作和报表 先看第一个Histogram 如果想学习Java工程化、高性能及分布式、深入浅出。微服务、Spring,MyBatis,Netty源码分析的朋友可以加我的Java高级交流:854630135,...
jmap -heap 29620 Attaching to process ID 29620, please wait... Debugger attached successfully. Client compiler detected. JVM version is 1.6.0-rc-b100 using thread-local object allocation. Mark Sweep Compact GC Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 671088...
使用jmap -heap命令查看堆的详细信息报错 java.lang.RuntimeException: unknown CollectedHeap type : class sun.jvm.hotspot.gc_interface.CollectedHeap [root@]#jmap-heap10094Attachingtoprocess ID10094,please wait...Debugger attached successfully.Server compiler detected.JVM versionis25.191-b12 ...