Although I have been arguing that performance monitoring and capacity planning require a decent server montoring environment, it also requires more. This extra part comes from the fact that often services depend on each other. A web service connects to a database (hosted on a different server) and fetches data from the file server (local, or SAN/NAS). Often, one part in the chain is a bottleneck for the whole of the process. This is a shame and can be avoided by careful analysis of the correlations between performance data.
Again, this is an argument in favor of what I called a 'load profile' earlier. By modeling a server by means of a load profile, we get a representation of that server in terms of measurable quantities. Statistics and mathematics in general can then help us analyze the correlations between those load profiles.
Monday, December 17, 2007
Performance Monitoring: Correlations
Posted by Toni at 4:33 PM
Labels: Capacity, Monitoring, Performance
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