# mbean
[`mbean` online tutorial ](https://arthas.aliyun.com/doc/arthas-tutorials.html?language=en&id=command-mbean )
::: tip
show Mbean information
:::
This command can show or monitor Mbean attribute information.
## Parameters
| Name | Specification |
| ------------------: | :---------------------------------------------------------------------------------------------------- |
| _name-pattern_ | pattern for the Mbean name |
| _attribute-pattern_ | pattern for the attribute name |
| [m] | show meta information |
| [i:] | specify the interval to refresh attribute value (ms) |
| [n:] | execution times |
| [E] | turn on regex matching while the default mode is wildcard matching. Only effect on the attribute name |
## Usage
show all Mbean names:
```bash
mbean
```
show meta data of Mbean:
```bash
mbean -m java.lang:type=Threading
```
show attributes of Mbean:
```bash
mbean java.lang:type=Threading
```
Mbean name support wildcard matcher:
```bash
mbean java.lang:type=Th*
```
::: warning
Notes： ：
:::
Wildcards match specific attributes:
```bash
mbean java.lang:type=Threading *Count
```
Switch to regular matching using the `-E` command:
```bash
mbean -E java.lang:type=Threading PeakThreadCount|ThreadCount|DaemonThreadCount
```
Real-time monitoring using `-i` command:
```bash
mbean -i 1000 java.lang:type=Threading *Count
```
Real-time monitoring using `-i` with number of times the command will be executed using `-n` command (100 times by default):
```bash
mbean -i 1000 -n 50 java.lang:type=Threading *Count
```
