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Active Monitoring

In addition to reviewing the ColdFusion logs and Web server logs, it's helpful to have a good picture of how your Web server looks from outside the network (especially if you think you might have a network bottleneck). If you are managing your own Web server and it is located offsite, a good network-monitoring package will give you some perspective on server uptime, as well as any network latency coming to and going from your Web site. If you don't have a monitoring package yet, take a look at Mercury SiteScope (http://www.mercury.com/us/products/application-management/foundation/monitors/sitescope/). When you run SiteScope on a machine connected to a network other than the one hosting your server, SiteScope will check the health of your site at specific intervals. It provides a graphical dashboard of server activity, viewable through a Web browser. Besides SiteScope, a number of great open-source monitoring tools are available that will run on Linux.

If your server is managed by someone else or hosted at a co-location facility, the management company should have a monitoring tool in place. It's good practice to ask routinely for the server's uptime percentage, as well as time frames and explanations for any outages. Not only will you be checking up on the efficiency of your management company, but you might also get an idea of how traffic and usage affect site downtime.


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