Fix RAM Usage Get

agent/main.go

@@ -44,7 +44,16 @@ type CPUResponse struct {
 }
 
 type MemoryResponse struct {
-	Percent float64 `json:"percent"`
+	Active    int64   `json:"active"`
+	Available int64   `json:"available"`
+	Buffers   int64   `json:"buffers"`
+	Cached    int64   `json:"cached"`
+	Free      int64   `json:"free"`
+	Inactive  int64   `json:"inactive"`
+	Percent   float64 `json:"percent"`
+	Shared    int64   `json:"shared"`
+	Total     int64   `json:"total"`
+	Used      int64   `json:"used"`
 }
 
 type FSResponse []struct {
@@ -447,7 +456,23 @@ func checkAndUpdateServerStatus(db *sql.DB, client *http.Client, servers []Serve
 						updateServerStatus(db, server.ID, false, 0, 0, 0)
 						online = false
 					} else {
-						ramUsage = memData.Percent
+						// Calculate actual RAM usage excluding swap, cache, and buffers
+						// Formula: (total - free - cached - buffers) / total * 100
+						// This is the most accurate representation of actual used RAM
+						actualUsedRam := memData.Total - memData.Free - memData.Cached - memData.Buffers
+						if actualUsedRam < 0 {
+							actualUsedRam = 0 // Safeguard against negative values
+						}
+
+						if memData.Total > 0 {
+							ramUsage = float64(actualUsedRam) / float64(memData.Total) * 100
+							fmt.Printf("%s Calculated RAM usage: %.2f%% (Used: %d MB, Total: %d MB)\n",
+								logPrefix, ramUsage, actualUsedRam/1024/1024, memData.Total/1024/1024)
+						} else {
+							// Fallback to the provided percentage if calculation fails
+							ramUsage = memData.Percent
+							fmt.Printf("%s Using provided memory percentage because total is zero\n", logPrefix)
+						}
 					}
 				}
 			}