Can you narrow it down?
- Is it all servers? If so, have you configuered anti-virus exclusions?
- Just servers with a specific operating system?
- Just a specific management pack \ application?
If you've done some custom rules and monitors then depending on how you've scoped them then this could be causing an issue. Or has someone done an override to run a rule \ monitor too frequently?
And what is too much? And is it a flat line high or does in go in peaks and troughs? If it is a peak on a regular basis e.g. every 5 minutes, every 15 minutes, every hour then chances are that it is a rule or a monitor.