After one pharma hack attack I had upgraded my site from 1.5.21 1.5.22 to 25. But after this my shared hosting account was disabled and I saw heavy performance increase in the cpu graph. Previously I was running some 10 sites along with it having more than traffic of 3500/day ( total including my pre-upgraded site = +7000/day).
Now I'm managing the sites in two different hosting accounts.
What could be the issue?