Hi, @itsmezeeshan the graph data will be populated by the Service Monitor, you need to check the SMON logs for that and also If the number of events is more in your cluster you might need to increase SMON java and non-java heap memory for the processing for all the events and turn them into charts data.  ... View more

In addition as per your last comments, we can see you have a considerable amount of data under your /home directory.   ex:  15G /home   Could you please check if you can remove some data from it?    Thanks ... View more