1. OS level
a. CPU (Multicore, exceeds 40% needs pay attention to)
b. Memory (Memory increase, page commit)
c. Disk (disk time(read, write, transfer), IO ability, disk space)
d. Network (loading)
tools:
a. Windows Task Manager(taskmgr)
b. Windows Performance Monitor(perfmon)
c. PAL(Performance Analysis of Logs)
2. Application level
a. Database(Number of Deadlocks/sec, Lock requests/sec, Active Transactions, Transactions/sec, DTC Calls, OLEDB calls, Extended Procedures)
b. IIS
c. .Net Framework