What Data Looks Like for This Category
Documents and materials for commodity trading mainly come from internal contract management systems, warehouse receipt management systems, financial settlement systems, and external customs and logistics documents. The documents include structured fields such as trading entity information, commodity category, measured quantity, transaction amount, delivery clauses, and compliance clauses. Units include tons, cubic meters, kilograms, US dollars, Chinese yuan, and others. Document formats mix structured forms and long-text contracts. The full document length for a single transaction varies widely. Documents are generated immediately after a single transaction is completed. Historical archived files are synced periodically on a regular basis.
Constraints Imposed on Vector Models and Indexing
Multiple structured fields with large unit differences increase the difficulty of feature alignment during vector embedding. Unified embedding logic adapted to multiple field types is required. Long-text contracts have large paragraph spans, which may split core transaction clauses during chunking and reduce retrieval accuracy. Real-time generated transaction documents require index synchronization delay to be kept within a reasonable range. Otherwise, retrieved content will lag behind business progress. Document formats vary significantly across different commodity categories. Compatibility with diverse document parsing and chunking rules is needed to avoid format adaptation errors. defaultToken and maxToken must be properly configured to accommodate documents of different lengths.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Range | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Adapts to the long-text structure of commodity trading contracts, covers complete transaction clauses while avoiding over-fragmented chunks |
| Overlap Length | 100–200 characters | Ensures clause continuity between adjacent chunks, prevents core transaction information from being split |
defaultToken | 4096 token | Adapts to the single-chunk content length of most commodity trading documents, balances embedding efficiency and information completeness |
maxToken | 16384 token | Supports complete context retrieval for long contracts, meets retrieval requirements for complex transaction clauses |
| Similarity Threshold | 0.75–0.85 | Differentiates core transaction clauses from irrelevant auxiliary content, improves relevance of retrieval results |
| Single Search Limit | Top 10 results | Controls redundancy of retrieval results, prevents large language models from being disrupted by excessive irrelevant information |
Three Common Misconfigurations
- Phenomenon: Retrieval results show the target trading contract is matched, but the generated reply does not mention the delivery clauses in the contract. Cause: Core transaction clauses are split during chunking, leading to key information not being fully embedded into the vector index.
- Phenomenon: After uploading a warehouse receipt, the index status shows normal, but no matching results appear when searching for cargo quantity. Cause:
defaultTokenis set too small, leading to truncation of structured fields in the warehouse receipt and loss of key information. - Phenomenon: Newly generated settlement documents cannot be retrieved. Cause: Index synchronization frequency is set to daily batch updates, which does not match the business requirement for real-time generated documents, leading to new documents not being synced to the index library in a timely manner.
How to Verify Proper Configuration
- Upload a standard commodity trading contract, check the chunk preview interface, and confirm that core transaction clauses are not split into multiple independent chunks.
- Enter a query containing commodity category and delivery time, and verify that the similarity scores of retrieval results fall within the set threshold range.
- Generate a settlement document for a simulated transaction, wait 1 minute before performing a retrieval, and confirm that the new document can be matched normally.
- Check the index synchronization log, and confirm that the delay time of incremental synchronization meets actual business requirements.
The values provided are common starting points and should be measured 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 2026-09-28.