What this category of data looks like
Service consultation and reply data for expressway operations mainly comes from road network toll systems, traffic monitoring platforms, customer service ticket systems, and official policy document repositories. Data updates follow three rhythms: real-time traffic data refreshes every 1 to 5 minutes, service ticket data updates based on completion time, and policy documents update when released. Single consultation data includes consultation time, channel, problem type, reply content, completion time, associated road section number, toll station ID, and other fields. Metrics like traffic volume and response time have fixed units. Documents are mostly structured text, with some attached scanned files.
What constraints these characteristics impose on deployment and upgrade
High-frequency real-time traffic updates require matching incremental refresh rates for the vector database to prevent outdated data from being used for consultation replies. Fields associated with road sections and toll stations require precise filter conditions during retrieval to narrow the recall scope. Fixed fields in structured documents must retain contextual associations during chunking to avoid damaging information integrity. Storage needs for attached scanned files require configuring a dedicated file storage service to adapt to concurrent pressure from batch uploads. Reference only; verify against the target FastGPT release and deployment documentation.
How to set the configuration
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
| Maximum database connections | 20-30 | Adapts to concurrent consultation requests in expressway operation scenarios, avoids database connection exhaustion |
| Vector database refresh interval | 300 seconds | Matches the update frequency of real-time traffic data, ensures timeliness of consultation replies |
| File storage endpoint | Configure based on deployment environment | Used to store files such as attachments and work order scanned files for expressway service consultations |
| Number of single-recall results | Top 8 | Covers common expressway traffic and toll consultation scenarios, avoids interference from redundant results |
| Timeout threshold | 60 seconds | Matches the average response requirement for expressway service consultations, avoids long wait times |
| Maximum file upload size | 10 MB | Adapts to the size range of common toll tickets and work order scanned files |
Three common errors
- Phenomenon: Consultation replies time out, and the interface displays a 504 status code. Cause: The timeout threshold is not adjusted for the expressway scenario. The default threshold is too short, so an error is returned before retrieval finishes.
- Phenomenon: The vector model cannot connect normally, and retrieval results are empty. Cause: Correct vector database connection parameters are not configured, or the vector dimension requirements for expressway data are not matched.
- Phenomenon: An error occurs when uploading toll tickets or work order attachments, and the interface prompts unsupported file format. Cause: The allowed file type whitelist is not configured, or the file size exceeds the preset upper limit.
How to confirm the configuration is complete
- Initiate a common expressway consultation, such as "What is the toll standard for XX Toll Station", and check that the response time meets the preset timeout threshold.
- Upload a toll ticket image, confirm that the upload is successful and can be viewed in the system file management interface.
- Check the database connection log, confirm that the current number of connections does not exceed the configured maximum connection limit.
- Test vector retrieval, enter a traffic description, and confirm that the recall results include matching expressway traffic information.
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.