cmd/utils: double limit on free-disk monitor (#24781)

This PR doubles the limit on which to trigger automatic shutdown, and also changes the timer to run once every 30s instead of 60s.

cmd/utils/cmd.go

@@ -77,11 +77,11 @@ func StartNode(ctx *cli.Context, stack *node.Node, isConsole bool) {
 		signal.Notify(sigc, syscall.SIGINT, syscall.SIGTERM)
 		defer signal.Stop(sigc)
 
-		minFreeDiskSpace := ethconfig.Defaults.TrieDirtyCache
+		minFreeDiskSpace := 2 * ethconfig.Defaults.TrieDirtyCache // Default 2 * 256Mb
 		if ctx.GlobalIsSet(MinFreeDiskSpaceFlag.Name) {
 			minFreeDiskSpace = ctx.GlobalInt(MinFreeDiskSpaceFlag.Name)
 		} else if ctx.GlobalIsSet(CacheFlag.Name) || ctx.GlobalIsSet(CacheGCFlag.Name) {
-			minFreeDiskSpace = ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheGCFlag.Name) / 100
+			minFreeDiskSpace = 2 * ctx.GlobalInt(CacheFlag.Name) * ctx.GlobalInt(CacheGCFlag.Name) / 100
 		}
 		if minFreeDiskSpace > 0 {
 			go monitorFreeDiskSpace(sigc, stack.InstanceDir(), uint64(minFreeDiskSpace)*1024*1024)
@@ -131,7 +131,7 @@ func monitorFreeDiskSpace(sigc chan os.Signal, path string, freeDiskSpaceCritica
 		} else if freeSpace < 2*freeDiskSpaceCritical {
 			log.Warn("Disk space is running low. Geth will shutdown if disk space runs below critical level.", "available", common.StorageSize(freeSpace), "critical_level", common.StorageSize(freeDiskSpaceCritical))
 		}
-		time.Sleep(60 * time.Second)
+		time.Sleep(30 * time.Second)
 	}
 }