---
# System prepended metadata

title: 1.3 Change the RAM size for iPeriGrain

---

1.3 Change the RAM size for iPeriGrain
===

- The default RAM size for IPeriGrain is 1G (1024m). Users can change the RAM size manually.

- Following the steps below to open IPeriGrain with larger RAM size
    1. Open CMD
    2. Change the working folder where the "GrainSizing-1.0-jfx.jar" locates.
    3. key in:
```javascript=
java -Dlogging.config=classpath:resource/log4j2.xml -Xmx2048m -jar GrainSizing-1.0-jfx.jar
```
- This command give IPeriGrain 2048m. Users can change the value by themselves.
- The maximum RAM size you can assign to iPeriGrain is 0.5 $\times$ your computer's RAM size 