wsry opened a new pull request #18471:
URL: https://github.com/apache/flink/pull/18471
## What is the purpose of the change
The data output buffer of sort-shuffle is for better disk IO performance and
currently, the total data output buffer size is 16M which is pretty big.
However, blocking request too many buffers may influence performance. This
ticket aims to reduce the maximum number of data output buffers to reduce the
buffer request time. The selected value is an empirical one based on the TPC-DS
test results.
## Brief change log
- Reduce the maximum size of data output buffers per result partition for
sort-shuffle from 16M to 8M.
## Verifying this change
This change is already covered by existing tests.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
