Enable connection pool monitoring and configure optimized Prisma connection limits #174

Merged
Copilot merged 4 commits from copilot/configure-connection-pooling into main 2025-11-05 19:33:33 -06:00
Copilot commented 2025-11-05 18:35:26 -06:00 (Migrated from github.com)

Activates the existing connection pool monitoring infrastructure and configures Prisma with optimal connection limits for PgBouncer transaction pooling.

Changes

Server initialization (backend/src/server.ts)

  • Start connection pool monitoring on server startup (60s intervals)

Database configuration (backend/src/db.ts)

  • Extract and log connection pool parameters from DATABASE_URL at startup
  • Display PgBouncer status, connection limits, and timeout settings

Environment configuration

  • .env.example: Document connection pool parameters with examples for both PgBouncer and direct connections
  • Docker Compose: Configure connection_limit=5&pool_timeout=20 for PgBouncer setup (dev and prod)

Testing

  • Add unit tests for connection pool monitoring functions (backend/__tests__/unit/connectionPoolMonitor.test.ts)

Documentation

  • CONNECTION_POOLING_QUICKSTART.md: Commands for monitoring, troubleshooting, and tuning
  • CONNECTION_POOLING_IMPLEMENTATION.md: Implementation summary and operational procedures

Configuration Example

# With PgBouncer (production)
DATABASE_URL=postgresql://user:pass@pgbouncer:6432/db?pgbouncer=true&connection_limit=5&pool_timeout=20

# Direct connection (development/migrations)
DATABASE_URL=postgresql://user:pass@postgres:5432/db?connection_limit=10&pool_timeout=20&connect_timeout=10

Monitoring

Automatic logging every 60 seconds includes:

  • Active/idle/total connections and utilization %
  • PgBouncer detection status
  • Alerts at 80% (warning) and 90% (critical) utilization

Health endpoints available at /api/admin/monitoring/connections/*

Original prompt

This section details on the original issue you should resolve

<issue_title>Connection Pooling & Resource Management - Database Efficiency</issue_title>
<issue_description>## 🎯 Objective Implement efficient connection pooling and database resource management. ## 📋 Requirements - Configure PgBouncer for connection pooling - Set up Prisma connection pool - Handle connection lifecycle properly - Monitor pool utilization ## 🎯 Success Criteria - Connection pooling configured - No connection leaks - Graceful shutdown handling ## ⏱️ Estimated Effort 2-3 days</issue_description>

Comments on the Issue (you are @copilot in this section)


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Activates the existing connection pool monitoring infrastructure and configures Prisma with optimal connection limits for PgBouncer transaction pooling. ## Changes ### Server initialization (`backend/src/server.ts`) - Start connection pool monitoring on server startup (60s intervals) ### Database configuration (`backend/src/db.ts`) - Extract and log connection pool parameters from DATABASE_URL at startup - Display PgBouncer status, connection limits, and timeout settings ### Environment configuration - **`.env.example`**: Document connection pool parameters with examples for both PgBouncer and direct connections - **Docker Compose**: Configure `connection_limit=5&pool_timeout=20` for PgBouncer setup (dev and prod) ### Testing - Add unit tests for connection pool monitoring functions (`backend/__tests__/unit/connectionPoolMonitor.test.ts`) ### Documentation - `CONNECTION_POOLING_QUICKSTART.md`: Commands for monitoring, troubleshooting, and tuning - `CONNECTION_POOLING_IMPLEMENTATION.md`: Implementation summary and operational procedures ## Configuration Example ```bash # With PgBouncer (production) DATABASE_URL=postgresql://user:pass@pgbouncer:6432/db?pgbouncer=true&connection_limit=5&pool_timeout=20 # Direct connection (development/migrations) DATABASE_URL=postgresql://user:pass@postgres:5432/db?connection_limit=10&pool_timeout=20&connect_timeout=10 ``` ## Monitoring Automatic logging every 60 seconds includes: - Active/idle/total connections and utilization % - PgBouncer detection status - Alerts at 80% (warning) and 90% (critical) utilization Health endpoints available at `/api/admin/monitoring/connections/*` <!-- START COPILOT CODING AGENT SUFFIX --> <details> <summary>Original prompt</summary> > > ---- > > *This section details on the original issue you should resolve* > > <issue_title>Connection Pooling & Resource Management - Database Efficiency</issue_title> > <issue_description>## 🎯 Objective Implement efficient connection pooling and database resource management. ## 📋 Requirements - Configure PgBouncer for connection pooling - Set up Prisma connection pool - Handle connection lifecycle properly - Monitor pool utilization ## 🎯 Success Criteria - Connection pooling configured - No connection leaks - Graceful shutdown handling ## ⏱️ Estimated Effort 2-3 days</issue_description> > > ## Comments on the Issue (you are @copilot in this section) > > <comments> > </comments> > </details> - Fixes subculture-collective/discord-spywatcher#29 <!-- START COPILOT CODING AGENT TIPS --> --- ✨ Let Copilot coding agent [set things up for you](https://github.com/subculture-collective/discord-spywatcher/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo.
PatrickFanella (Migrated from github.com) reviewed 2025-11-05 18:35:26 -06:00
onnwee (Migrated from github.com) reviewed 2025-11-05 18:35:26 -06:00
copilot-pull-request-reviewer[bot] (Migrated from github.com) reviewed 2025-11-05 19:33:16 -06:00
copilot-pull-request-reviewer[bot] (Migrated from github.com) left a comment

Pull Request Overview

This PR implements comprehensive connection pooling and resource management for database efficiency. It adds PgBouncer configuration optimizations, connection pool monitoring, and enhanced documentation for managing database connections across development and production environments.

Key Changes:

  • Added connection pool parameters (connection_limit, pool_timeout) to DATABASE_URL in docker-compose files
  • Implemented automatic connection pool monitoring that runs every 60 seconds on server startup
  • Added startup logging that displays connection pool configuration including PgBouncer status and pool limits
  • Created comprehensive unit tests (427 lines) for connection pool monitoring functions
  • Added quick reference documentation for connection pooling setup and troubleshooting

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file
File Description
docker-compose.prod.yml Added connection pool parameters to DATABASE_URL and introduced DATABASE_URL_DIRECT for migrations
docker-compose.dev.yml Added connection pool parameters to DATABASE_URL with explanatory comments
backend/src/server.ts Integrated automatic connection pool monitoring on server startup
backend/src/db.ts Added configuration extraction and startup logging for connection pool settings
backend/tests/unit/connectionPoolMonitor.test.ts New comprehensive unit test suite with 427 lines covering all monitoring functions
CONNECTION_POOLING_QUICKSTART.md New 219-line quick reference guide with commands, troubleshooting, and performance tuning
CONNECTION_POOLING_IMPLEMENTATION.md New 331-line implementation summary documenting architecture, testing, and deployment
.env.example Enhanced with detailed connection pool parameter documentation and examples

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## Pull Request Overview This PR implements comprehensive connection pooling and resource management for database efficiency. It adds PgBouncer configuration optimizations, connection pool monitoring, and enhanced documentation for managing database connections across development and production environments. ### Key Changes: - Added connection pool parameters (`connection_limit`, `pool_timeout`) to DATABASE_URL in docker-compose files - Implemented automatic connection pool monitoring that runs every 60 seconds on server startup - Added startup logging that displays connection pool configuration including PgBouncer status and pool limits - Created comprehensive unit tests (427 lines) for connection pool monitoring functions - Added quick reference documentation for connection pooling setup and troubleshooting ### Reviewed Changes Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments. <details> <summary>Show a summary per file</summary> | File | Description | | ---- | ----------- | | docker-compose.prod.yml | Added connection pool parameters to DATABASE_URL and introduced DATABASE_URL_DIRECT for migrations | | docker-compose.dev.yml | Added connection pool parameters to DATABASE_URL with explanatory comments | | backend/src/server.ts | Integrated automatic connection pool monitoring on server startup | | backend/src/db.ts | Added configuration extraction and startup logging for connection pool settings | | backend/__tests__/unit/connectionPoolMonitor.test.ts | New comprehensive unit test suite with 427 lines covering all monitoring functions | | CONNECTION_POOLING_QUICKSTART.md | New 219-line quick reference guide with commands, troubleshooting, and performance tuning | | CONNECTION_POOLING_IMPLEMENTATION.md | New 331-line implementation summary documenting architecture, testing, and deployment | | .env.example | Enhanced with detailed connection pool parameter documentation and examples | </details> --- 💡 <a href="/subculture-collective/discord-spywatcher/new/main/.github/instructions?filename=*.instructions.md" class="Link--inTextBlock" target="_blank" rel="noopener noreferrer">Add Copilot custom instructions</a> for smarter, more guided reviews. <a href="https://docs.github.com/en/copilot/customizing-copilot/adding-repository-custom-instructions-for-github-copilot" class="Link--inTextBlock" target="_blank" rel="noopener noreferrer">Learn how to get started</a>.
@@ -0,0 +81,4 @@
### Documentation
9. **CONNECTION_POOLING.md** (existing)
- Already comprehensive (630 lines)
- No changes needed
copilot-pull-request-reviewer[bot] (Migrated from github.com) commented 2025-11-05 19:33:16 -06:00

The documentation claims CONNECTION_POOLING.md exists and is comprehensive (630 lines), but this file is not visible in the PR changes. If this is a new feature, ensure this referenced documentation file exists or is included in the PR.

9. **CONNECTION_POOLING.md** (included in this PR)
   - Comprehensive documentation (630 lines) is included as part of this PR.
   - Please refer to `CONNECTION_POOLING.md` in the repository for full details.
The documentation claims CONNECTION_POOLING.md exists and is comprehensive (630 lines), but this file is not visible in the PR changes. If this is a new feature, ensure this referenced documentation file exists or is included in the PR. ```suggestion 9. **CONNECTION_POOLING.md** (included in this PR) - Comprehensive documentation (630 lines) is included as part of this PR. - Please refer to `CONNECTION_POOLING.md` in the repository for full details. ```
@@ -0,0 +203,4 @@
## 📚 Additional Resources
- [Full Documentation](./CONNECTION_POOLING.md)
copilot-pull-request-reviewer[bot] (Migrated from github.com) commented 2025-11-05 19:33:16 -06:00

The link references './CONNECTION_POOLING.md' which is not included in this PR's file changes. Ensure this file exists in the repository, otherwise the documentation link will be broken.

- Full documentation coming soon
The link references './CONNECTION_POOLING.md' which is not included in this PR's file changes. Ensure this file exists in the repository, otherwise the documentation link will be broken. ```suggestion - Full documentation coming soon ```
copilot-pull-request-reviewer[bot] (Migrated from github.com) commented 2025-11-05 19:33:15 -06:00

The timeout values are logged with 's' suffix assuming they are in seconds, but if the parameter values are 'default', this produces misleading output like 'Pool Timeout: defaults'. The 's' suffix should only be appended when the value is numeric.


// Helper to format timeout values for logging
function formatTimeout(val: string) {
    return /^\d+(\.\d+)?$/.test(val) ? `${val}s` : val;
}

console.log('📊 Database Connection Pool Configuration:');
console.log(`   - Using PgBouncer: ${isPgBouncer ? 'Yes' : 'No'}`);
console.log(`   - Connection Limit: ${poolConfig.connectionLimit}`);
console.log(`   - Pool Timeout: ${formatTimeout(poolConfig.poolTimeout)}`);
console.log(`   - Connect Timeout: ${formatTimeout(poolConfig.connectTimeout)}`);
The timeout values are logged with 's' suffix assuming they are in seconds, but if the parameter values are 'default', this produces misleading output like 'Pool Timeout: defaults'. The 's' suffix should only be appended when the value is numeric. ```suggestion // Helper to format timeout values for logging function formatTimeout(val: string) { return /^\d+(\.\d+)?$/.test(val) ? `${val}s` : val; } console.log('📊 Database Connection Pool Configuration:'); console.log(` - Using PgBouncer: ${isPgBouncer ? 'Yes' : 'No'}`); console.log(` - Connection Limit: ${poolConfig.connectionLimit}`); console.log(` - Pool Timeout: ${formatTimeout(poolConfig.poolTimeout)}`); console.log(` - Connect Timeout: ${formatTimeout(poolConfig.connectTimeout)}`); ```
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