Monitoring Portal and iView Usage

Hello,

We are running EP6 SP2.

What tools are people using for monitoring - other than what is provided under "Monitoring" in the portal. What we need is a way to monitor what users have accessed which iViews, to monitor network performance, and to recreate errors the users experience. Let me know what the pros and cons are of using the particular vendor package you are using.

Thank You,

Melissa