3.5. Configure Expiration

In Red Hat JBoss Data Grid, expiration is configured in a manner similar to eviction.

Procedure 3.1. Configure Expiration

Add the Expiration Tag
Add the <expiration> tag to your project's <cache> tags as follows:
```
<expiration />
```
```
<expiration />
```
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Set the Expiration Lifespan
Set the lifespan value to set the period of time (in milliseconds) an entry can remain in memory. The following is an example of this step:
```
<expiration lifespan="1000" />
```
```
<expiration lifespan="1000" />
```
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Set the Maximum Idle Time
Set the time that entries are allowed to remain idle (unused) after which they are removed (in milliseconds). The default value is -1 for unlimited time.
```
<expiration lifespan="1000" max-idle="1000" />
```
```
<expiration lifespan="1000" max-idle="1000" />
```
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