Increase default chunk size for async request #6542
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should we just increase to 128 KB to be consistent with sync? |
zoewangg
reviewed
Nov 4, 2025
| * Default chunk size for Async trailer based checksum data transfer* | ||
| */ | ||
| public static final int DEFAULT_ASYNC_CHUNK_SIZE = 16 * 1024; | ||
| public static final int DEFAULT_ASYNC_CHUNK_SIZE = 64 * 1024; |
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This is only used by legacy code, right?
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Yes, the SRA path is already consistent with sync by this change: #6514 . Changed the wording in changelog.
Fred1155
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…-sdk-java-v2 into bole/increase_default_chunk_size
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zoewangg
approved these changes
Nov 5, 2025
S-Saranya1
approved these changes
Nov 6, 2025
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Motivation and Context
According to public S3 documentation, https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html , the chunk size is recomended to be at least 64 Kb to achieve better performance. The current default chunk size for sync is 128 KB. With the change in #6514 , the default chunk size for async request using SRA is also 128 KB. However the default chunk size for async for legacy code path is 16 Kb.
Modifications
Increase the DEFAULT_ASYNC_CHUNK_SIZE from 16Kb to 128Kb
Testing
Screenshots (if appropriate)
Types of changes
Checklist
mvn installsucceedsscripts/new-changescript and following the instructions. Commit the new file created by the script in.changes/next-releasewith your changes.License