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update vmoption/vmtool doc
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hengyunabc
@@ -29,10 +29,16 @@ import com.taobao.middleware.cli.annotations.Summary;
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* @author hengyunabc 2019-09-02
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*
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*/
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// @formatter:off
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@Name("vmoption")
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@Summary("Display, and update the vm diagnostic options.")
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@Description("\nExamples:\n" + " vmoption\n" + " vmoption PrintGCDetails\n" + " vmoption PrintGCDetails true\n"
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+ Constants.WIKI + Constants.WIKI_HOME + "vmoption")
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@Description("\nExamples:\n" +
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" vmoption\n" +
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" vmoption PrintGC\n" +
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" vmoption PrintGC true\n" +
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" vmoption PrintGCDetails true\n" +
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Constants.WIKI + Constants.WIKI_HOME + "vmoption")
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//@formatter:on
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public class VMOptionCommand extends AnnotatedCommand {
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private static final Logger logger = LoggerFactory.getLogger(VMOptionCommand.class);
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@@ -40,16 +40,26 @@ vmoption
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#### View individual option
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```bash
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[arthas@56963]$ vmoption PrintGCDetails
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------------------
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PrintGCDetails false MANAGEMENT true
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$ vmoption PrintGC
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------
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PrintGC false MANAGEMENT true
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```
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#### Update individual option
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```bash
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[arthas@56963]$ vmoption PrintGCDetails true
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$ vmoption PrintGC true
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Successfully updated the vm option.
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PrintGCDetails=true
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NAME BEFORE-VALUE AFTER-VALUE
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------------------------------------
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PrintGC false true
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```
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```bash
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$ vmoption PrintGCDetails true
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Successfully updated the vm option.
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NAME BEFORE-VALUE AFTER-VALUE
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-------------------------------------------
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PrintGCDetails false true
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```
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@@ -79,4 +79,6 @@ vmtool --action getInstances --classLoaderClass org.springframework.boot.loader.
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```bash
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vmtool --action forceGc
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```
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```
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* Use the [`vmoption`](vmoption.md) command to dynamically turn on the `PrintGC` option.
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@@ -40,16 +40,26 @@ vmoption
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#### 查看指定的option
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```bash
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[arthas@56963]$ vmoption PrintGCDetails
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------------------
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PrintGCDetails false MANAGEMENT true
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$ vmoption PrintGC
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------
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PrintGC false MANAGEMENT true
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```
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#### 更新指定的option
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```bash
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[arthas@56963]$ vmoption PrintGCDetails true
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$ vmoption PrintGC true
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Successfully updated the vm option.
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PrintGCDetails=true
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NAME BEFORE-VALUE AFTER-VALUE
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------------------------------------
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PrintGC false true
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```
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```bash
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$ vmoption PrintGCDetails true
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Successfully updated the vm option.
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NAME BEFORE-VALUE AFTER-VALUE
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-------------------------------------------
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PrintGCDetails false true
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```
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@@ -80,4 +80,6 @@ vmtool --action getInstances --classLoaderClass org.springframework.boot.loader.
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```bash
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vmtool --action forceGc
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```
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```
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* 可以结合 [`vmoption`](vmoption.md) 命令动态打开`PrintGC`开关。
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@@ -13,8 +13,8 @@
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Examples:
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vmoption
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vmoption PrintGCDetails
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vmoption PrintGCDetails true
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vmoption PrintGC
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vmoption PrintGC true
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WIKI:
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https://arthas.aliyun.com/doc/vmoption
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@@ -61,35 +61,53 @@
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### 查看指定的option
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`vmoption PrintGCDetails`{{execute T2}}
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`vmoption PrintGC`{{execute T2}}
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```bash
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[arthas@56963]$ vmoption PrintGCDetails
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------------------
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PrintGCDetails false MANAGEMENT true
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$ vmoption PrintGC
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KEY VALUE ORIGIN WRITEABLE
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---------------------------------------------------------------------------------
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PrintGC false MANAGEMENT true
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```
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### 更新指定的option
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`vmoption PrintGC true`{{execute T2}}
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```bash
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$ vmoption PrintGC true
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Successfully updated the vm option.
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NAME BEFORE-VALUE AFTER-VALUE
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------------------------------------
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PrintGC false true
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```
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再使用`vmtool`命令执行强制GC，则可以在`Terminal 1`看到打印出GC日志：
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`vmtool --action forceGc`{{execute T2}}
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```
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[GC (JvmtiEnv ForceGarbageCollection) 33752K->19564K(251392K), 0.0082960 secs]
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[Full GC (JvmtiEnv ForceGarbageCollection) 19564K->17091K(166912K), 0.0271085 secs]
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```
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### 配置打印GC详情
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`vmoption PrintGCDetails true`{{execute T2}}
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```bash
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[arthas@56963]$ vmoption PrintGCDetails true
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$ vmoption PrintGCDetails true
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Successfully updated the vm option.
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PrintGCDetails=true
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NAME BEFORE-VALUE AFTER-VALUE
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-------------------------------------------
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PrintGCDetails false true
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```
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此时，切换到arthas demo 运行所在的`Terminal`，使用`Ctrl+c`退出，发现比之前多打印了GC垃圾回收信息：
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再使用`vmtool`命令执行强制GC，则可以在`Terminal 1`看到打印出GC详情：
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`vmtool --action forceGc`{{execute T2}}
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```bash
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Heap
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def new generation total 10432K, used 5682K [0x00000000f4800000, 0x00000000f5350000, 0x00000000f8550000)
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eden space 9280K, 61% used [0x00000000f4800000, 0x00000000f4d8cad0, 0x00000000f5110000)
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from space 1152K, 0% used [0x00000000f5110000, 0x00000000f5110000, 0x00000000f5230000)
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to space 1152K, 0% used [0x00000000f5230000, 0x00000000f5230000, 0x00000000f5350000)
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tenured generation total 22992K, used 13795K [0x00000000f8550000, 0x00000000f9bc4000, 0x0000000100000000)
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the space 22992K, 59% used [0x00000000f8550000, 0x00000000f92c8cc8, 0x00000000f92c8e00, 0x00000000f9bc4000)
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Metaspace used 14926K, capacity 15128K, committed 15360K, reserved 1062912K
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class space used 1895K, capacity 1954K, committed 2048K, reserved 1048576K
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```
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[GC (JvmtiEnv ForceGarbageCollection) [PSYoungGen: 4395K->352K(76288K)] 21487K->17443K(166912K), 0.0013122 secs] [Times: user=0.01 sys=0.00, real=0.00 secs]
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[Full GC (JvmtiEnv ForceGarbageCollection) [PSYoungGen: 352K->0K(76288K)] [ParOldGen: 17091K->16076K(88064K)] 17443K->16076K(164352K), [Metaspace: 20651K->20651K(1069056K)], 0.0251548 secs] [Times: user=0.15 sys=0.01, real=0.02 secs]
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```
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@@ -13,8 +13,8 @@ Display, and update the vm diagnostic options.
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Examples:
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vmoption
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vmoption PrintGCDetails
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vmoption PrintGCDetails true
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vmoption PrintGC
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vmoption PrintGC true
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WIKI:
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https://arthas.aliyun.com/doc/vmoption
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@@ -71,25 +71,42 @@ Display, and update the vm diagnostic options.
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```
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### Update individual option
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`vmoption PrintGC true`{{execute T2}}
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```bash
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$ vmoption PrintGC true
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Successfully updated the vm option.
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NAME BEFORE-VALUE AFTER-VALUE
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------------------------------------
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PrintGC false true
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```
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Then use the `vmtool` command to force GC, you can see the GC log printed in `Terminal 1`:
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`vmtool --action forceGc`{{execute T2}}
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```
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[GC (JvmtiEnv ForceGarbageCollection) 33752K->19564K(251392K), 0.0082960 secs]
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[Full GC (JvmtiEnv ForceGarbageCollection) 19564K->17091K(166912K), 0.0271085 secs]
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```
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### Configure print GC details
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`vmoption PrintGCDetails true`{{execute T2}}
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```bash
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[arthas@56963]$ vmoption PrintGCDetails true
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$ vmoption PrintGCDetails true
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Successfully updated the vm option.
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PrintGCDetails=true
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NAME BEFORE-VALUE AFTER-VALUE
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-------------------------------------------
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PrintGCDetails false true
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```
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Now，if we switch to the `Terminal` where arthas demo is running，and use `Ctrl+c` to exit，you will find it prints out Garbage Collection details：
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Then use the `vmtool` command to force GC, you can see the GC details printed in `Terminal 1`:
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`vmtool --action forceGc`{{execute T2}}
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```bash
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Heap
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def new generation total 10432K, used 5682K [0x00000000f4800000, 0x00000000f5350000, 0x00000000f8550000)
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eden space 9280K, 61% used [0x00000000f4800000, 0x00000000f4d8cad0, 0x00000000f5110000)
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from space 1152K, 0% used [0x00000000f5110000, 0x00000000f5110000, 0x00000000f5230000)
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to space 1152K, 0% used [0x00000000f5230000, 0x00000000f5230000, 0x00000000f5350000)
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tenured generation total 22992K, used 13795K [0x00000000f8550000, 0x00000000f9bc4000, 0x0000000100000000)
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the space 22992K, 59% used [0x00000000f8550000, 0x00000000f92c8cc8, 0x00000000f92c8e00, 0x00000000f9bc4000)
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Metaspace used 14926K, capacity 15128K, committed 15360K, reserved 1062912K
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class space used 1895K, capacity 1954K, committed 2048K, reserved 1048576K
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```
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[GC (JvmtiEnv ForceGarbageCollection) [PSYoungGen: 4395K->352K(76288K)] 21487K->17443K(166912K), 0.0013122 secs] [Times: user=0.01 sys=0.00, real=0.00 secs]
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[Full GC (JvmtiEnv ForceGarbageCollection) [PSYoungGen: 352K->0K(76288K)] [ParOldGen: 17091K->16076K(88064K)] 17443K->16076K(164352K), [Metaspace: 20651K->20651K(1069056K)], 0.0251548 secs] [Times: user=0.15 sys=0.01, real=0.02 secs]
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```
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