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All automatically recorded information can be viewed in comprehensive GUI views.
MediationZone constantly collects information from the different sub-systems and hosts in the system. This information is among other things used for load balancing. By using the System Statistics tool, it is possible to view collected statistics.
There are various kinds of statistics that are described more in detail in subsequent chapters.
Host Statistics
MediationZone collects statistics from the different machines hosting a Platform or Execution Context. For example, the load of the CPU or the number of context switches. This is called host statistics.
MediationZone uses an external binary called vmstat
to collect the information. This binary must be installed to have statistics collected and to perform load-balancing work for workflows. All values that are collected from a host can be selected from a list. On newer operating systems some of these may not be available for collection due to changes in the kernel of the operations system.
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When a workflow is running, MediationZone continuously collects information on how much data is being processed. This (throughput) is measured per second. In most cases this number will be UDRs per second but e there are no UDRs routed in the workflow it will instead be raw data per second. The throughput is sampled every five seconds.
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Pico Instance Statistics
Every minute MediationZone collects memory information from the different Java processes defining the Platform and the Execution Context. This information shows how much memory is used and how much memory that can be used for the running process.
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