yugan95 commented on PR #8160:
URL: https://github.com/apache/paimon/pull/8160#issuecomment-4665805890
Updated shrink logic to use a combined fixed-cap and ratio check,
consistent with #8159:
```
bufferSize > 4MB && bufferSize > recordLength * 4
```
This replaces the previous fixed-threshold-only approach (bufferSize > 4MB
&& length < 4MB) which would miss cases like a 100MB buffer with 5MB records
(ratio 20x, clearly worth shrinking but previously retained because 5MB > 4MB).
Tests updated to 6 cases covering the ratio-based scenarios.
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