What the data for this category looks like
Data for this category comes from code repositories, documentation site build logs, user feedback, and version release records. Updates occur weekly or alongside version releases. Daily maintenance documents include installation guides, API documentation, migration guides, and FAQs. Most document structures use hierarchical headings paired with code blocks and step-by-step instructions. Fields include version numbers, update times, and supported environments. Content is adjusted continuously with technical iterations, and there are no uniform fixed units.
What constraints do these characteristics impose on the document parsing and chunking workflow?
The mixed structure of hierarchical headings and code blocks requires parsing to retain semantic hierarchy. This avoids splitting that breaks logical connections. The weekly or version-aligned update rhythm means parsing must adapt to frequently changing content. It must also support incremental parsing adaptations. Different document types vary widely in length. API documentation may be only a few pages, while migration guides can span dozens of pages. Parsing must accommodate files of different sizes. User feedback and build logs can identify parsing failure scenarios. Abnormal data must be synchronized to maintenance workflows. Compliance review requirements also mandate that sensitive content identification covers potential risks in code examples and step-by-step instructions.
How to configure the parameters
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the semantic length of single sections in installation guides and API documentation, avoids splitting that breaks code blocks or step logic |
chunkSplitter | Split by heading hierarchy | Matches the hierarchical structure of documents, retains complete chapter semantics, and adapts to the formatting of different document types |
customPdfParse | Enabled | Supports parsing PDF documents exported from code repositories, retains code block and formula formatting, and adapts to the parsing needs of technical documents |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Adapts to the upload requirements of large documents such as migration guides, prevents parsing interruptions caused by oversized files |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Covers the parsing time required for large documents, prevents task failure caused by timeouts, and adapts to batch document parsing during version releases |
chunkSettingMode | Manual configuration | Adjusts chunking parameters for different document types, meets the differentiated parsing needs of installation guides and API documentation |
Three common errors
- An error occurs during JSON parsing, with the symptom being a
parse json failedstatus code or empty fields in the parsing result. The root cause is failure to correctly configure the format adaptation forchunkSplitter, which prevents parsed content from being converted to a standard JSON structure. - After integrating a custom parsing tool, results are continuously awaited until a timeout occurs. The symptom is that the task status remains in parsing, eventually triggering a timeout error. The root cause is failure to set a reasonable
PARSE_FILE_TIMEOUT_SECONDSparameter, which does not adapt to the parsing time required for large files. - The file parsing function cannot be enabled in a local deployment. The symptom is that no parsing logs are generated after uploading a file, and the task status stays at pending. The root cause is failure to enable the
customPdfParseconfiguration item and configure the corresponding environment variables for parsing dependencies.
How to confirm configurations are properly set
- Upload a small installation document, check if the parsed chunks retain the hierarchical relationship between section headings and code blocks, to verify the configuration effects of
chunkSizeandchunkSplitter. - Upload a migration guide larger than 500 MB, check if the task completes parsing within 600 seconds, to verify the rationality of
UPLOAD_FILE_MAX_SIZEandPARSE_FILE_TIMEOUT_SECONDSconfigurations. - Trigger a batch document parsing task, check if complete parsing logs are generated, to verify whether the
customPdfParseconfiguration is active. - Based on the version features of FastGPT v4.17.0, adjust
chunkSettingModeto automatic mode, compare the chunking results with manual configuration, and confirm that the parameters adapt to the document types currently maintained.
The values provided are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-10-19.