1.找到apache-jmeter-5.4.1\bin\jmeter.bat
2.编辑jmeter.bat
3.找到如下内容if not defined HEAP (
4.复制下面这段代码，替换上去，我配置的是最小1G，最大8G
if not defined HEAP (
rem See the unix startup file for the rationale of the following parameters,
rem including some tuning recommendations
set HEAP=-Xms1024m -Xmx8192m

)
5.保存
6.重新打开jmeter.bat，修改后的内存就生效了
注:CMD窗口仅是提示用，无实际意义，因为实际运行时，jmeter.log
日志输出的是8G内存
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2021-09-05 18:22:05,460 INFO o.a.j.JMeter: Max memory =8589934592
2021-09-05 18:22:05,460 INFO o.a.j.JMeter: Available Processors =8