How long and frequent do my blog needs maintenance.?

For the past few days i was not able to post in my own blog or even comment on other blogs.Nasib baik i was able to surf the website..hmmmm..What maintenance is being done i am not quite sure.Everything seems to look just the same..except that now i am on the sign in mode all the time...The sign out mode is not functioning...talk about maintenance... Sure spoil my blogging mood!