pgbalancer: Connection Pooling & Load Balancing
Enterprise-Grade PostgreSQL Performance Optimization
pgbalancer-demo
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Connection PoolingLoad BalancingHigh PerformanceREST APIProduction Ready
Overview
Why pgbalancer
Connection Pooling
Efficient connection reuse reduces overhead and improves scalability.
Load Balancing
Distribute queries across multiple PostgreSQL servers for optimal performance.
High Availability
Automatic failover and health checks ensure continuous operation.
REST API Management
Modern REST API replaces legacy PCP protocol for easier integration.
Query Routing
Intelligent routing directs read/write queries to appropriate servers.
Performance Monitoring
Built-in metrics and monitoring for real-time insights.
Depth
Feature Matrix
| Feature | Description | Benefit | Performance | Scalability |
|---|---|---|---|---|
| Connection Pooling | Reuses database connections across client requests | 10x connection efficiency, reduced latency | <1ms overhead per query | 1000s of concurrent clients |
| Load Balancing | Distributes queries across backend servers | Horizontal scaling, optimized resource usage | Smart algorithm selection | 100+ backend nodes |
| Health Monitoring | Continuous backend health checks | Automatic failover, high availability | Configurable intervals | Multi-backend monitoring |
| Query Cache | In-memory caching for frequently used queries | Reduced database load, faster responses | Memory-backed, microsecond retrieval | Configurable cache size |
| REST API | Modern HTTP API for management and monitoring | Easy integration, standard protocols | Async, non-blocking | Stateless, cloud-native |
| Statement Routing | Smart routing of read/write queries | Optimized replica usage, primary protection | Query parsing & classification | Read replica fan-out |
Comparison
Feature Comparison
| Feature | pgbalancer | pgpool-II | PgBouncer | Pgcat |
|---|---|---|---|---|
| Connection Pooling | ✓ Advanced | ✓ Advanced | ✓ Basic | ✓ Advanced |
| Load Balancing | ✓ Multi-algo | ✓ Multi-algo | ✗ | ✓ Round-robin |
| REST API | ✓ Native | ~ PCP protocol | ✗ | ~ HTTP stats |
| Query Cache | ✓ Built-in | ✓ Built-in | ✗ | ✗ |
| Health Checks | ✓ Advanced | ✓ Advanced | ~ Basic | ✓ Advanced |
| Failover Support | ✓ Automatic | ✓ Automatic | ✗ | ✓ Automatic |
| Statement Routing | ✓ Intelligent | ✓ Intelligent | ✗ | ~ Basic |
| Performance | High (C) | High (C) | Very High (C) | High (Rust) |
Internals
Technical Documentation
Dive deep into pgbalancer's technical details, architecture, and internal workings with our comprehensive documentation.