What the data for this category looks like
Data related to non-ferrous minor metal marketing primarily comes from domestic non-ferrous industry association supply and demand weekly reports, daily quotes from spot exchanges, production capacity disclosures from manufacturing enterprises, and custom marketing materials. The data update cadence has tiered schedules: spot quote data updates daily, industry supply and demand analysis reports update weekly, and annual production capacity planning data updates quarterly.
Document structures include fields such as product name, daily transaction average price, price change range, inventory turnover days, origin, and delivery unit. Units cover multiple measurement standards including yuan per kilogram, yuan per ton, and tons. Some marketing materials are long text-image documents that include product characteristics and application scenario descriptions.
What constraints do these characteristics impose on knowledge base retrieval and recall
Tiered data updates require the retrieval process to distinguish recall weights between real-time and static data, to avoid returning expired historical quotes or outdated supply and demand data. Multi-unit fields require unit normalization before retrieval, otherwise results for the same category with different units will be mixed. Mixed short and long document structures require adapted chunking strategies, to prevent loss of core marketing information when long documents are truncated, or failure to cover complete user query intent with short documents.
Marketing documents also have strong scenario orientation. It is necessary to combine application scenario keywords from user searches to prioritize recall of more matching material content.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunk_size | 800–1200 characters | Non-ferrous minor metal marketing documents include long-form product descriptions and short-form quote data. This chunk length balances context completeness and retrieval accuracy |
similarity_threshold | 0.72–0.85 | The non-ferrous minor metal category has many specialized terms. This threshold filters irrelevant results while retaining matching content for specific application scenarios |
recall_top_k | Top 8 results | Marketing content recall needs to cover multiple document types including quotes, research reports, and materials. 8 results provide sufficient reference without overloading users |
PARSE_FILE_TIMEOUT_SECONDS | 120 seconds | Parsing some long documents takes extended time. This configuration prevents parsing failures due to timeout |
UPLOAD_FILE_MAX_SIZE | 500 MB | Bulk marketing materials and historical data documents for non-ferrous minor metals have large file sizes. This upper limit covers most upload scenarios |
rerank_top_k | Top 3 results | Marketing content needs to precisely match user scenario requirements. Retaining the top 3 results after reranking improves content relevance |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material format, data volume, and business rules. Specific issues require case-by-case analysis, and it is recommended to test against your own samples before finalizing.
Three Common Mistakes
- Issue: Knowledge base retrieval interface calls return results taking longer than 30 seconds, and some quote queries trigger timeouts. Cause: Incremental indexing is not configured for frequently updated quote documents of non-ferrous minor metals. Full index scanning causes retrieval delays.
- Issue: API document insertion returns a
413 Request Entity Too Largeerror. Cause: TheUPLOAD_FILE_MAX_SIZEconfiguration item is not adjusted, and the uploaded marketing material document exceeds the default limit. - Issue: Retrieval results show quote data with inconsistent units, such as prices for the same category displayed in both yuan per ton and yuan per kilogram. Cause: Field unit normalization configuration is not enabled, and price fields are not uniformly converted during retrieval.
How to Verify Proper Configuration
- Run a retrieval test with keywords for the non-ferrous minor metal category, and check that the update times of returned results match the actual update cadence of the category.
- Upload non-ferrous minor metal marketing documents of different sizes, verify that the upload interface returns no errors, and confirm that the configuration items are effective.
- Review the field information in retrieval results, confirm that all price-related fields are unified to the same unit.
- Adjust the similarity threshold configuration, verify that the matching accuracy of retrieval results meets scenario requirements.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.