Bad response time

Bad response time : over second.
Bad throughput : 50%

Checked the system resource, found the server's CPU is very high ~90%.

 This application is run on java platform, then check GC log, and found the GC pause is too high as:

Why? the heap size is small?

Does it always mean memory leak?

As the chart, the red line is tenured GC, blue line is nursery GC, we can see a up trend of red line, does it mean memory leak?

How to use Xming + Putty

1. start Xming by default
2. open Putty
1. session : SSH 
2. conection:SSH->X11 , checked below 

High DB2 cpu