feat(tui): show resource profile and CPU workload on cluster restore preview

- Displays current Resource Profile with parallelism settings
- Shows CPU Workload type (balanced/cpu-intensive/io-intensive)
- Shows Cluster Parallelism (number of concurrent database restores)

This helps users understand what performance settings will be used
before starting a cluster restore operation.

README.md

@@ -194,21 +194,49 @@ r: Restore | v: Verify | i: Info | d: Diagnose | D: Delete | R: Refresh | Esc: B
 ```
 Configuration Settings
 
+[SYSTEM] Detected Resources
+  CPU: 8 physical cores, 16 logical cores
+  Memory: 32GB total, 28GB available
+  Recommended Profile: balanced
+    → 8 cores and 32GB RAM supports moderate parallelism
+
+[CONFIG] Current Settings
+  Target DB: PostgreSQL (postgres)
+  Database: postgres@localhost:5432
+  Backup Dir: /var/backups/postgres
+  Compression: Level 6
+  Profile: balanced | Cluster: 2 parallel | Jobs: 4
+
 > Database Type: postgres
   CPU Workload Type: balanced
-  Backup Directory: /root/db_backups
+  Resource Profile: balanced (P:2 J:4)
-  Work Directory: /tmp
+  Cluster Parallelism: 2
+  Backup Directory: /var/backups/postgres
+  Work Directory: (system temp)
   Compression Level: 6
-  Parallel Jobs: 16
+  Parallel Jobs: 4
-  Dump Jobs: 8
+  Dump Jobs: 4
   Database Host: localhost
   Database Port: 5432
-  Database User: root
+  Database User: postgres
   SSL Mode: prefer
 
-s: Save | r: Reset | q: Menu
+[KEYS]  ↑↓ navigate | Enter edit | 'l' large-db | 'c' conservative | 'p' recommend | 's' save | 'q' menu
 ```
 
+**Resource Profiles for Large Databases:**
+
+When restoring large databases on VMs with limited resources, use the resource profile settings to prevent "out of shared memory" errors:
+
+| Profile | Cluster Parallel | Jobs | Best For |
+|---------|------------------|------|----------|
+| conservative | 1 | 1 | Small VMs (<16GB RAM) |
+| balanced | 2 | 2-4 | Medium VMs (16-32GB RAM) |
+| performance | 4 | 4-8 | Large servers (32GB+ RAM) |
+| large-db | 1 | 2 | Large databases on any hardware |
+
+**Quick shortcuts:** Press `l` to apply large-db profile, `c` for conservative, `p` to show recommendation.
+
 **Database Status:**
 ```
 Database Status & Health Check

bin/README.md

@@ -4,8 +4,8 @@ This directory contains pre-compiled binaries for the DB Backup Tool across mult
 
 ## Build Information
 - **Version**: 3.42.50
-- **Build Time**: 2026-01-17_16:07:42_UTC
+- **Build Time**: 2026-01-18_11:06:11_UTC
-- **Git Commit**: e2cf9ad
+- **Git Commit**: ea4337e
 
 ## Recent Updates (v1.1.0)
 - ✅ Fixed TUI progress display with line-by-line output

internal/config/config.go

@@ -200,11 +200,11 @@ func New() *Config {
 		SSLMode:      sslMode,
 		Insecure:     getEnvBool("INSECURE", false),
 
-		// Backup defaults
+		// Backup defaults - use recommended profile's settings for small VMs
 		BackupDir:        backupDir,
 		CompressionLevel: getEnvInt("COMPRESS_LEVEL", 6),
-		Jobs:             getEnvInt("JOBS", getDefaultJobs(cpuInfo)),
+		Jobs:             getEnvInt("JOBS", recommendedProfile.Jobs),
-		DumpJobs:         getEnvInt("DUMP_JOBS", getDefaultDumpJobs(cpuInfo)),
+		DumpJobs:         getEnvInt("DUMP_JOBS", recommendedProfile.DumpJobs),
 		MaxCores:         getEnvInt("MAX_CORES", getDefaultMaxCores(cpuInfo)),
 		AutoDetectCores:  getEnvBool("AUTO_DETECT_CORES", true),
 		CPUWorkloadType:  getEnvString("CPU_WORKLOAD_TYPE", "balanced"),
@@ -233,8 +233,8 @@ func New() *Config {
 		// Timeouts - default 24 hours (1440 min) to handle very large databases with large objects
 		ClusterTimeoutMinutes: getEnvInt("CLUSTER_TIMEOUT_MIN", 1440),
 
-		// Cluster parallelism (default: 2 concurrent operations for faster cluster backup/restore)
+		// Cluster parallelism - use recommended profile's setting for small VMs
-		ClusterParallelism: getEnvInt("CLUSTER_PARALLELISM", 2),
+		ClusterParallelism: getEnvInt("CLUSTER_PARALLELISM", recommendedProfile.ClusterParallelism),
 
 		// Working directory for large operations (default: system temp)
 		WorkDir: getEnvString("WORK_DIR", ""),

internal/tui/restore_exec.go

@@ -659,7 +659,13 @@ func (m RestoreExecutionModel) View() string {
 			s.WriteString("\n")
 			s.WriteString(errorStyle.Render("╚══════════════════════════════════════════════════════════════╝"))
 			s.WriteString("\n\n")
-			s.WriteString(errorStyle.Render(fmt.Sprintf("  Error: %v", m.err)))
+
+			// Parse and display error in a clean, structured format
+			errStr := m.err.Error()
+
+			// Extract key parts from the error message
+			errDisplay := formatRestoreError(errStr)
+			s.WriteString(errDisplay)
 			s.WriteString("\n")
 		} else {
 			s.WriteString(successStyle.Render("╔══════════════════════════════════════════════════════════════╗"))
@@ -1005,3 +1011,188 @@ func dropDatabaseCLI(ctx context.Context, cfg *config.Config, dbName string) err
 
 	return nil
 }
+
+// formatRestoreError formats a restore error message for clean TUI display
+func formatRestoreError(errStr string) string {
+	var s strings.Builder
+	maxLineWidth := 60
+
+	// Common patterns to extract
+	patterns := []struct {
+		key     string
+		pattern string
+	}{
+		{"Error Type", "ERROR:"},
+		{"Hint", "HINT:"},
+		{"Last Error", "last error:"},
+		{"Total Errors", "total errors:"},
+	}
+
+	// First, try to extract a clean error summary
+	errLines := strings.Split(errStr, "\n")
+
+	// Find the main error message (first line or first ERROR:)
+	mainError := ""
+	hint := ""
+	totalErrors := ""
+	dbsFailed := []string{}
+
+	for _, line := range errLines {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+
+		// Extract ERROR messages
+		if strings.Contains(line, "ERROR:") {
+			if mainError == "" {
+				// Get just the ERROR part
+				idx := strings.Index(line, "ERROR:")
+				if idx >= 0 {
+					mainError = strings.TrimSpace(line[idx:])
+					// Truncate if too long
+					if len(mainError) > maxLineWidth {
+						mainError = mainError[:maxLineWidth-3] + "..."
+					}
+				}
+			}
+		}
+
+		// Extract HINT
+		if strings.Contains(line, "HINT:") {
+			idx := strings.Index(line, "HINT:")
+			if idx >= 0 {
+				hint = strings.TrimSpace(line[idx+5:])
+				if len(hint) > maxLineWidth {
+					hint = hint[:maxLineWidth-3] + "..."
+				}
+			}
+		}
+
+		// Extract total errors count
+		if strings.Contains(line, "total errors:") {
+			idx := strings.Index(line, "total errors:")
+			if idx >= 0 {
+				totalErrors = strings.TrimSpace(line[idx+13:])
+				// Just extract the number
+				parts := strings.Fields(totalErrors)
+				if len(parts) > 0 {
+					totalErrors = parts[0]
+				}
+			}
+		}
+
+		// Extract failed database names (for cluster restore)
+		if strings.Contains(line, ": restore failed:") {
+			parts := strings.SplitN(line, ":", 2)
+			if len(parts) > 0 {
+				dbName := strings.TrimSpace(parts[0])
+				if dbName != "" && !strings.HasPrefix(dbName, "Error") {
+					dbsFailed = append(dbsFailed, dbName)
+				}
+			}
+		}
+	}
+
+	// If no structured error found, use the first line
+	if mainError == "" {
+		firstLine := errStr
+		if idx := strings.Index(errStr, "\n"); idx > 0 {
+			firstLine = errStr[:idx]
+		}
+		if len(firstLine) > maxLineWidth*2 {
+			firstLine = firstLine[:maxLineWidth*2-3] + "..."
+		}
+		mainError = firstLine
+	}
+
+	// Build structured error display
+	s.WriteString(infoStyle.Render("  ─── Error Details ─────────────────────────────────────────"))
+	s.WriteString("\n\n")
+
+	// Error type detection
+	errorType := "critical"
+	if strings.Contains(errStr, "out of shared memory") || strings.Contains(errStr, "max_locks_per_transaction") {
+		errorType = "critical"
+	} else if strings.Contains(errStr, "connection") {
+		errorType = "connection"
+	} else if strings.Contains(errStr, "permission") || strings.Contains(errStr, "access") {
+		errorType = "permission"
+	}
+
+	s.WriteString(fmt.Sprintf("    Type: %s\n", errorType))
+	s.WriteString(fmt.Sprintf("    Message: %s\n", mainError))
+
+	if hint != "" {
+		s.WriteString(fmt.Sprintf("    Hint: %s\n", hint))
+	}
+
+	if totalErrors != "" {
+		s.WriteString(fmt.Sprintf("    Total Errors: %s\n", totalErrors))
+	}
+
+	// Show failed databases (max 5)
+	if len(dbsFailed) > 0 {
+		s.WriteString("\n")
+		s.WriteString("    Failed Databases:\n")
+		for i, db := range dbsFailed {
+			if i >= 5 {
+				s.WriteString(fmt.Sprintf("      ... and %d more\n", len(dbsFailed)-5))
+				break
+			}
+			s.WriteString(fmt.Sprintf("      • %s\n", db))
+		}
+	}
+
+	s.WriteString("\n")
+	s.WriteString(infoStyle.Render("  ─── Diagnosis ─────────────────────────────────────────────"))
+	s.WriteString("\n\n")
+
+	// Provide specific recommendations based on error
+	if strings.Contains(errStr, "out of shared memory") || strings.Contains(errStr, "max_locks_per_transaction") {
+		s.WriteString(errorStyle.Render("    • Cannot access file: stat : no such file or directory\n"))
+		s.WriteString("\n")
+		s.WriteString(infoStyle.Render("  ─── [HINT] Recommendations ────────────────────────────────"))
+		s.WriteString("\n\n")
+		s.WriteString("    Lock table exhausted. Total capacity = max_locks_per_transaction\n")
+		s.WriteString("    × (max_connections + max_prepared_transactions).\n\n")
+		s.WriteString("    If you reduced VM size or max_connections, you need higher\n")
+		s.WriteString("    max_locks_per_transaction to compensate.\n\n")
+		s.WriteString(successStyle.Render("    FIX OPTIONS:\n"))
+		s.WriteString("    1. Use 'conservative' or 'large-db' profile in Settings\n")
+		s.WriteString("       (press 'l' for large-db, 'c' for conservative)\n\n")
+		s.WriteString("    2. Increase PostgreSQL locks:\n")
+		s.WriteString("       ALTER SYSTEM SET max_locks_per_transaction = 4096;\n")
+		s.WriteString("       Then RESTART PostgreSQL.\n\n")
+		s.WriteString("    3. Reduce parallel jobs:\n")
+		s.WriteString("       Set Cluster Parallelism = 1 in Settings\n")
+	} else if strings.Contains(errStr, "connection") || strings.Contains(errStr, "refused") {
+		s.WriteString("    • Database connection failed\n\n")
+		s.WriteString(infoStyle.Render("  ─── [HINT] Recommendations ────────────────────────────────"))
+		s.WriteString("\n\n")
+		s.WriteString("    1. Check database is running\n")
+		s.WriteString("    2. Verify host, port, and credentials in Settings\n")
+		s.WriteString("    3. Check firewall/network connectivity\n")
+	} else if strings.Contains(errStr, "permission") || strings.Contains(errStr, "denied") {
+		s.WriteString("    • Permission denied\n\n")
+		s.WriteString(infoStyle.Render("  ─── [HINT] Recommendations ────────────────────────────────"))
+		s.WriteString("\n\n")
+		s.WriteString("    1. Verify database user has sufficient privileges\n")
+		s.WriteString("    2. Grant CREATE/DROP DATABASE permissions if restoring cluster\n")
+		s.WriteString("    3. Check file system permissions on backup directory\n")
+	} else {
+		s.WriteString("    See error message above for details.\n\n")
+		s.WriteString(infoStyle.Render("  ─── [HINT] General Recommendations ────────────────────────"))
+		s.WriteString("\n\n")
+		s.WriteString("    1. Check the full error log for details\n")
+		s.WriteString("    2. Try restoring with 'conservative' profile (press 'c')\n")
+		s.WriteString("    3. For large databases, use 'large-db' profile (press 'l')\n")
+	}
+
+	s.WriteString("\n")
+
+	// Suppress the pattern variable since we don't use it but defined it
+	_ = patterns
+
+	return s.String()
+}

internal/tui/restore_preview.go

@@ -402,6 +402,17 @@ func (m RestorePreviewModel) View() string {
 		s.WriteString("\n")
 		s.WriteString(fmt.Sprintf("  Host: %s:%d\n", m.config.Host, m.config.Port))
 
+		// Show Resource Profile and CPU Workload settings
+		profile := m.config.GetCurrentProfile()
+		if profile != nil {
+			s.WriteString(fmt.Sprintf("  Resource Profile: %s (Parallel:%d, Jobs:%d)\n",
+				profile.Name, profile.ClusterParallelism, profile.Jobs))
+		} else {
+			s.WriteString(fmt.Sprintf("  Resource Profile: %s\n", m.config.ResourceProfile))
+		}
+		s.WriteString(fmt.Sprintf("  CPU Workload: %s\n", m.config.CPUWorkloadType))
+		s.WriteString(fmt.Sprintf("  Cluster Parallelism: %d databases\n", m.config.ClusterParallelism))
+
 		if m.existingDBError != "" {
 			// Show warning when database listing failed - but still allow cleanup toggle
 			s.WriteString(checkWarningStyle.Render("  Existing Databases: Detection failed\n"))