add cache stats to debug page

core/http/server.go

@@ -218,14 +218,11 @@ func (s *Server) handleDebugStats(ctx *fasthttp.RequestCtx) {
 	stats := utils.CollectSystemStats(s.config)
 
 	routeCount, bytecodeBytes := s.luaRouter.GetRouteStats()
-	//stateCount := s.luaRunner.GetStateCount()
-	//activeStates := s.luaRunner.GetActiveStateCount()
 
 	stats.Components = utils.ComponentStats{
 		RouteCount:    routeCount,
 		BytecodeBytes: bytecodeBytes,
-		//StatesCount:   stateCount,
+		SessionStats:  sessions.GlobalSessionManager.GetCacheStats(),
-		//ActiveStates:  activeStates,
 	}
 
 	ctx.SetContentType("text/html; charset=utf-8")

core/sessions/manager.go

@@ -246,3 +246,22 @@ func (sm *SessionManager) CookieOptions() map[string]any {
 
 // GlobalSessionManager is the default session manager instance
 var GlobalSessionManager = NewSessionManager(DefaultMaxSessions)
+
+// GetCacheStats returns statistics about the session cache
+func (sm *SessionManager) GetCacheStats() map[string]uint64 {
+	if sm == nil || sm.cache == nil {
+		return map[string]uint64{}
+	}
+
+	var stats fastcache.Stats
+	sm.cache.UpdateStats(&stats)
+
+	return map[string]uint64{
+		"entries":   stats.EntriesCount,
+		"bytes":     stats.BytesSize,
+		"max_bytes": stats.MaxBytesSize,
+		"gets":      stats.GetCalls,
+		"sets":      stats.SetCalls,
+		"misses":    stats.Misses,
+	}
+}

core/utils/debug.go

@@ -13,9 +13,10 @@ import (
 
 // ComponentStats holds stats from various system components
 type ComponentStats struct {
-	RouteCount    int   // Number of routes
+	RouteCount    int               // Number of routes
-	BytecodeBytes int64 // Total size of bytecode in bytes
+	BytecodeBytes int64             // Total size of bytecode in bytes
-	ModuleCount   int   // Number of loaded modules
+	ModuleCount   int               // Number of loaded modules
+	SessionStats  map[string]uint64 // Session cache statistics
 }
 
 // SystemStats represents system statistics for debugging
@@ -34,14 +35,12 @@ func CollectSystemStats(cfg *config.Config) SystemStats {
 	var stats SystemStats
 	var mem runtime.MemStats
 
-	// Collect basic system info
 	stats.Timestamp = time.Now()
 	stats.GoVersion = runtime.Version()
 	stats.GoRoutines = runtime.NumGoroutine()
 	stats.Version = metadata.Version
 	stats.Config = cfg
 
-	// Collect memory stats
 	runtime.ReadMemStats(&mem)
 	stats.Memory = mem
 
@@ -121,6 +120,20 @@ table tr:nth-child(even), tbody tr:nth-child(even) { background-color: rgba(0, 0
         </div>
     </div>
 
+    <div class="section">
+        <h2>Sessions</h2>
+        <div class="card">
+            <table>
+                <tr><th>Active Sessions</th><td>{{index .Components.SessionStats "entries"}}</td></tr>
+                <tr><th>Cache Size</th><td>{{ByteCount (index .Components.SessionStats "bytes")}}</td></tr>
+                <tr><th>Max Cache Size</th><td>{{ByteCount (index .Components.SessionStats "max_bytes")}}</td></tr>
+                <tr><th>Cache Gets</th><td>{{index .Components.SessionStats "gets"}}</td></tr>
+                <tr><th>Cache Sets</th><td>{{index .Components.SessionStats "sets"}}</td></tr>
+                <tr><th>Cache Misses</th><td>{{index .Components.SessionStats "misses"}}</td></tr>
+            </table>
+        </div>
+    </div>
+
     <div class="section">
         <h2>LuaRunner</h2>
         <div class="card">
@@ -161,10 +174,9 @@ table tr:nth-child(even), tbody tr:nth-child(even) { background-color: rgba(0, 0
 
 	// Create a template function map
 	funcMap := template.FuncMap{
-		"ByteCount": func(b interface{}) string {
+		"ByteCount": func(b any) string {
 			var bytes uint64
 
-			// Convert the value to uint64
 			switch v := b.(type) {
 			case uint64:
 				bytes = v
@@ -173,7 +185,7 @@ table tr:nth-child(even), tbody tr:nth-child(even) { background-color: rgba(0, 0
 			case int:
 				bytes = uint64(v)
 			default:
-				return "Unknown"
+				return fmt.Sprintf("%T: %v", b, b)
 			}
 
 			const unit = 1024