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Author	SHA1	Message	Date
mleku	88b0509ad8	Implement PID-controlled adaptive rate limiting for database operations - Add LoadMonitor interface in pkg/interfaces/loadmonitor/ for database load metrics - Implement PIDController with filtered derivative to suppress high-frequency noise - Proportional (P): immediate response to current error - Integral (I): eliminates steady-state offset with anti-windup clamping - Derivative (D): rate-of-change prediction with low-pass filtering - Create BadgerLoadMonitor tracking L0 tables, compaction score, and cache hit ratio - Create Neo4jLoadMonitor tracking query semaphore usage and latencies - Add AdaptiveRateLimiter combining PID controllers for reads and writes - Configure via environment variables: - ORLY_RATE_LIMIT_ENABLED: enable/disable rate limiting - ORLY_RATE_LIMIT_TARGET_MB: target memory limit (default 1500MB) - ORLY_RATE_LIMIT__K[PID]: PID gains for reads/writes - ORLY_RATE_LIMIT_MAX__MS: maximum delays - ORLY_RATE_LIMIT_*_TARGET: setpoints for reads/writes - Integrate rate limiter into Server struct and lifecycle management - Add comprehensive unit tests for PID controller behavior Files modified: - app/config/config.go: Add rate limiting configuration options - app/main.go: Initialize and start/stop rate limiter - app/server.go: Add rateLimiter field to Server struct - main.go: Create rate limiter with appropriate monitor - pkg/run/run.go: Pass disabled limiter for test instances - pkg/interfaces/loadmonitor/: New LoadMonitor interface - pkg/ratelimit/: New PID controller and limiter implementation 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>	5 months ago

Author

SHA1

Message

Date

mleku

88b0509ad8

Implement PID-controlled adaptive rate limiting for database operations

- Add LoadMonitor interface in pkg/interfaces/loadmonitor/ for database load metrics
- Implement PIDController with filtered derivative to suppress high-frequency noise
  - Proportional (P): immediate response to current error
  - Integral (I): eliminates steady-state offset with anti-windup clamping
  - Derivative (D): rate-of-change prediction with low-pass filtering
- Create BadgerLoadMonitor tracking L0 tables, compaction score, and cache hit ratio
- Create Neo4jLoadMonitor tracking query semaphore usage and latencies
- Add AdaptiveRateLimiter combining PID controllers for reads and writes
- Configure via environment variables:
  - ORLY_RATE_LIMIT_ENABLED: enable/disable rate limiting
  - ORLY_RATE_LIMIT_TARGET_MB: target memory limit (default 1500MB)
  - ORLY_RATE_LIMIT_*_K[PID]: PID gains for reads/writes
  - ORLY_RATE_LIMIT_MAX_*_MS: maximum delays
  - ORLY_RATE_LIMIT_*_TARGET: setpoints for reads/writes
- Integrate rate limiter into Server struct and lifecycle management
- Add comprehensive unit tests for PID controller behavior

Files modified:
- app/config/config.go: Add rate limiting configuration options
- app/main.go: Initialize and start/stop rate limiter
- app/server.go: Add rateLimiter field to Server struct
- main.go: Create rate limiter with appropriate monitor
- pkg/run/run.go: Pass disabled limiter for test instances
- pkg/interfaces/loadmonitor/: New LoadMonitor interface
- pkg/ratelimit/: New PID controller and limiter implementation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

5 months ago

1 Commits (435a7b3302ec92ef8fd851c5d4eb7d031248cf46)