issue: #47178
This commit introduces a rate limiting mechanism for Write-Ahead Logging
(WAL) operations to prevent overload during high traffic. Key changes
include:
- Added `RateLimitObserver` to monitor and control the rate of DML
operations.
- Add Adaptive RateLimitController to apply the strategy of rate limit.
- WAL will slow down if the recovery-storage works on catchup mode or
node memory is high.
- Updated `WAL` and related components to handle rate limit states,
including rejection and slowdown.
- Introduced new error codes for rate limit rejection in the streaming
error handling.
- Enhanced tests to cover the new rate limiting functionality.
These changes aim to improve the stability and performance of the
streaming service under load.
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Signed-off-by: chyezh <chyezh@outlook.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Zhen Ye