Thanks for your reply. Actually, i enabled 59 counters to monitor cpu,disk,memory,network,asp.net applications etc. And I cant enabled in testing/development server. The load for these servers are very low. So, I enabled in production. And the frequency for logging is every 1 hour.
And, I cleared the log once a week. I really want to know that perfmon tool use memory/cpu for monitoring the server.
If server hangs or server load is high, how perfmon tool log the values.