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Configuring the Java heap
Configure the heap for the server and rich client – via installation, launcher (-Xmx) or the parameter CLIENT_MAX_HEAP_SIZE.
REFERENZ ADMINISTRATOR UPDATED: JUL 2026 APPLIES TO NUCLOS 4.2026.X
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Server
The server heap is set during installation.
Client (rich client)
The client heap can be configured in two places:
| Location | Setting |
|---|---|
| Launcher | Settings → Java configuration: for 4 GB add the entry -Xmx4096m. |
| Parameter | Set the parameter CLIENT_MAX_HEAP_SIZE e.g. to 4096m. |
Recommendation
For large data volumes or many open forms a higher client heap is recommended to avoid OutOfMemory errors.
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