How to modify the 4000 character maximum limit in dify1.9.1

[Jekie1]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

How can I modify the maximum number of segments? Why doesn't it work when I change "INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH: ${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH:-10000}"? Am I modifying it incorrectly? Why doesn't it take effect after I change it?

2. Additional context or comments

INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH: ${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH:-10000}

[dosubot[bot]]

To change the 4000 character maximum limit in Dify v1.9.1, set the environment variable INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH in your .env file or docker-compose.yaml (for Docker deployments) to your desired value, then fully restart all Docker containers or backend services for the change to take effect. The backend reads this variable at startup and uses it to enforce the maximum segment length for text chunking during indexing. There is no hardcoded cap—whatever you set in the config (minimum 50) will be used, but in practice, some UI or API flows may enforce a lower maximum (often 1000) due to system-level constraints or bugs in older versions.

If your changes don't take effect, double-check that you edited the correct .env file, restarted all containers, and that the variable is set inside the running containers (use docker exec -it <container_name> env | grep INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH). The value is interpreted as characters, not tokens, for most document types. The front-end UI will reflect the backend value after a restart. For more, see this code reference and deployment config.

To reply, just mention @dosu.

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