linux安装MAT(MemoryAnalyzerTool)工具

下载

地址: https://eclipse.dev/mat/downloads.php

注意: 1.12.0 Release需要JDK11

参数配置

在配置的部分，我们主要配置的是ParseHeapDump.sh脚本中的内存参数。

在脚本的最后一行的最后面，加上如下的参数
-vmargs -Xmx30g -XX:-UseGCOverheadLimit

具体的内存的大小，要根据dump的大小来修改，设置的太小会出现OOM的情况。

分析dump文件及生成报告

接下来，我们就是要通过ParseHeapDump.sh来分析dump文件

命令如下：

ParseHeapDump.sh <path/to/dump.hprof> [report]*

示例：

./mat/ParseHeapDump.sh ./gl.hprof org.eclipse.mat.api:suspects

执行过程，如下：

复制[root@nccztsjb-node-27 data]# ./mat/ParseHeapDump.sh ./gl.hprof org.eclipse.mat.api:suspects
WARNING: A terminally deprecated method in java.lang.System has been called
WARNING: System::setSecurityManager has been called by org.eclipse.osgi.internal.framework.SystemBundleActivator (file:/data/mat/plugins/org.eclipse.osgi_3.16.300.v20210525-1715.jar)
WARNING: Please consider reporting this to the maintainers of org.eclipse.osgi.internal.framework.SystemBundleActivator
WARNING: System::setSecurityManager will be removed in a future release
Task: Parsing gl.hprof
[Task: Parsing /data/./gl.hprof
[
Subtask: Scanning /data/./gl.hprof
[
[INFO] Detected compressed references, because with uncompressed 64-bit references the array at 0x7216eff10 would overlap the array at 0x7216ef5e0
[.