initial commit

internal/pkg/database/utils.go

@@ -0,0 +1,56 @@
+package database
+
+import (
+	"database/sql"
+	"time"
+
+	"github.com/rs/zerolog"
+
+	"base/pkg/metrics"
+)
+
+// monitorConnectionPool periodically monitors and records connection pool metrics
+func monitorConnectionPool(sqlDB *sql.DB, metric *metrics.Metrics, logger zerolog.Logger) {
+	ticker := time.NewTicker(30 * time.Second) // Monitor every 30 seconds
+	defer ticker.Stop()
+
+	for range ticker.C {
+		stats := sqlDB.Stats()
+
+		// Record connection pool metrics using available methods
+		// Note: Connection pool size metrics are not available in current metrics package
+		// Consider adding them if needed for monitoring
+
+		// Record wait time if there are any waits
+		if stats.WaitCount > 0 {
+			avgWaitTime := time.Duration(stats.WaitDuration.Nanoseconds() / stats.WaitCount)
+			metric.RecordDatabaseQuery("WaitTime", "database", avgWaitTime, nil)
+		}
+
+		// Log connection pool stats at info level for better visibility
+		logger.Info().
+			Int("open_connections", stats.OpenConnections).
+			Int("in_use", stats.InUse).
+			Int("idle", stats.Idle).
+			Int("max_open", stats.MaxOpenConnections).
+			Int64("wait_count", stats.WaitCount).
+			Int64("wait_duration_ms", stats.WaitDuration.Milliseconds()).
+			Msg("Database connection pool stats")
+
+		// Alert if we're approaching connection limits
+		if stats.OpenConnections >= 7 { // 7 out of 8 max connections
+			logger.Warn().
+				Int("open_connections", stats.OpenConnections).
+				Int("max_open", stats.MaxOpenConnections).
+				Msg("Database connection pool approaching limit - consider reducing concurrent operations")
+		}
+
+		// Alert if there are connection waits
+		if stats.WaitCount > 0 {
+			logger.Warn().
+				Int64("wait_count", stats.WaitCount).
+				Int64("wait_duration_ms", stats.WaitDuration.Milliseconds()).
+				Msg("Database connections are being waited for - possible connection pool exhaustion")
+		}
+	}
+}