Capacity Planning

Capacitas
Performance and capacity planning consultancy and training services. Includes whitepapers. Head office located in London, UK.
http://www.capacitas.co.uk/

Characterizing Web Response Time
Master's thesis by Binzhang Liu
http://scholar.lib.vt.edu/theses/available/etd-4798-11230/

CMG - Computer Measurement Group
Professional organization for capacity planners.
http://www.cmg.org/

DB2 System Performance Metrics
Here Joel Goldstein discusses various DB2 capacity metrics.
http://responsivesystems.com/papers/metrics/metrics.htm

Jonathan Hardwick
Product information about Microsoft's System Center Capacity Planner.
http://blogs.msdn.com/jonathanh

Load Balancing Your Web Site
Practical Approaches for Distributing HTTP Traffic by Ralf S.Engelschall.
http://www.webtechniques.com/archives/1998/05/engelschall/

PerfCap Corporation
PerfCap Corporation provides Performance Management and Capacity Planning Products and Services.
http://www.perfcap.com

Performance Dynamics Company
Develops performance tools, evaluates performance-related products, designs system benchmarks, and troubleshoots performance problems. Contact information, events calendar, and links to software tools.
http://www.perfdynamics.com/

Red Hill Networks' WebSpray
This tool allows you to stress test your web server through a LAN or modem connection. It will generate reports for errors and performance.
http://www.redhillnetworks.com/products/webspray.htm

RRD TOOL
A useful open source tool for storage and retrieval of time series data.
http://oss.oetiker.ch/rrdtool/

Schema
Schema is a provider of telecom resource management (TRM) solutions that enable operators of wireless networks worldwide to optimize and manage their resources.
http://www.schema.com

Transaction Design Inc.
Consultant and tools vendor with focus on system monitoring, capacity planning, and benchmarking. Tools work on HP/Compaq/Tandem NonStop Kernel, Stratus VOS, and UNIX. Articles on management/performance topics for these OSs.
http://www.banbottlenecks.com/

Watson & Walker, Inc.: Why Your CPU Capacity May Not Match Your Vendor's Estimate
Cheryl Watson discusses MVS and OS/390 capacity related issues.
http://www.watsonwalker.com/lspr.html