What data for this category looks like
Refinery financial report data primarily comes from public periodic financial reports and quarterly operation briefings released by refinery enterprises, as well as sector operation data published by industry regulators. Updates follow a quarterly, semi-annual, and annual periodic cadence, with temporary supplementary documents issued during major capacity adjustments or raw material price fluctuations. Most documents are multi-chapter structured PDFs, containing nested cross-page tables and long paragraphs of professional analysis text. Fields include raw material processing volume, product output volume, unit energy consumption, sector revenue, cost proportion, and more. Units cover tons, kilograms of standard coal, RMB yuan, and other measurement formats.
What constraints these characteristics impose on document parsing and chunking
Nested cross-page tables require parsing tools to preserve complete row and column structures. Splitting cross-page table rows breaks data logic. Dense professional terminology and multi-unit fields require binding terms, values, and corresponding units during chunking. This prevents mismatches between units and values during indexing. Temporary documents with inconsistent layouts lack fixed headers and footers. Parsing tools must automatically identify valid content areas to exclude irrelevant announcement elements. Long paragraphs of operation analysis text require balancing semantic integrity during chunking. Do not split complete professional analysis segments. Batch processing of quarterly financial reports demands chunking tools support efficient batch parsing workflows. This prevents single-processing timeouts.
How to set configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
CHUNK_SIZE | 800–1200 characters | Professional analysis paragraphs in refinery financial reports mostly fall within this length range, balancing semantic integrity and indexing density |
CHUNK_OVERLAP | 10–15% | Retains associations of professional terms across segments, preventing terms from being split into different segments |
PARSE_TABLE_ENABLE | Enabled | Refinery financial reports contain a large number of nested structured tables. Disabling this will lose core business data |
TABLE_CHUNK_MODE | Chunk by complete table | Avoids splitting cross-page table rows, ensuring logical integrity of table data |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large single refinery financial report PDFs have many pages and take longer to parse, preventing mid-process timeouts |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Adapts to the maximum file size limit for single annual refinery financial reports |
The parameter values provided on this page are general recommendations used as a starting point for configuration. Actual values are affected by material format, data volume and business rules. Specific issues require individual analysis, and it is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Phenomenon: After upgrading the version, the same refinery financial report CSV file cannot be chunked normally, and the interface returns a
413 Request Entity Too Largeerror. Cause: TheUPLOAD_FILE_MAX_SIZEparameter was not adjusted to adapt to the new version's file size verification rules. - Phenomenon: The total number of chunks after chunking the refinery financial report document exceeds the expected upper limit, causing the knowledge base indexing process to interrupt. Cause: No reasonable
CHUNK_SIZEparameter was set, resulting in overly short segments and exceeding the indexing load range for the number of chunks. - Phenomenon: After connecting a third-party document parsing tool, structured data from refinery financial reports cannot be imported correctly. Cause: No format adaptation rules were configured for the parsing tool, resulting in parsing results that cannot be recognized by the chunking module.
How to confirm the configuration is correct
- Upload a single typical refinery financial report PDF, and check if the table structure in the parsing preview interface is complete, with no cross-page tables split.
- Randomly select a segment of professional analysis text, and verify that the chunked segments retain complete semantics without unnecessary truncation.
- Check the system indexing logs to confirm that the chunking process has no timeouts or errors, and that the field association relationships in the chunking results are correct.
- For connected third-party parsing tools, verify that the parsed refinery business data can be imported normally and chunked completely.
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.