[BUG] RLS should use 32MB GRPC payload size limit

[Sicheng-Pan]

Description of changes

Summarize the changes made by this PR.

• Improvements & Bug fixes
  • Rust Log Service did not configure the max payload size, which defaults to 4MB. We would like to use 32MB payload size (which is the default for GRPC log client right now).
  • We would like to bump the max frag size from 8MB to 64MB (2*GRPC max payload size)
• New functionality
  • N/A

Test plan

Planning to perform data ingestion after config change

• Tests pass locally with pytest for python, yarn test for js, cargo test for rust

Documentation Changes

Are all docstrings for user-facing APIs updated if required? Do we need to make documentation changes in the docs section?

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[Sicheng-Pan]

• [BUG] RLS should use 32MB GRPC payload size limit #5044 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[propel-code-bot]

Increase GRPC Payload and Fragment Size Limits in Rust Log Service

This PR increases the GRPC message payload limit for the Rust Log Service (RLS) to 32MB, aligning it with the GRPC log client default, and adjusts configuration so the fragmentation (batch) limit is now 64MB (twice the GRPC payload limit). The changes ensure that both encoding/decoding message sizes in RLS are configurable and default to 32MB, and the WAL3 batching mechanism now defaults to 64MB fragment size.

Key Changes

• Added max_encoding_message_size and max_decoding_message_size fields to LogServerConfig with a 32MB default.
• Set GRPC server limits via .max_decoding_message_size() and .max_encoding_message_size() in LogServerWrapper::run.
• Increased WAL3's ThrottleOptions::batch_size_bytes default from 8MB to 64MB and updated config field comments.
• Updated all code paths using these config values to respect the new defaults.

Affected Areas

• rust/log-service/src/lib.rs
• rust/wal3/src/lib.rs
• Config loading and application
• GRPC server and WAL3 batch logic

This summary was automatically generated by @propel-code-bot