Collecting the output

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This section details the steps we took to gather the output for our test runs.

Linux statistics

The following data was collected for each measurement:
  • sadc/sar

    Generates CPU load, disk and network throughput.

Trade output

Below is a sample of the output produced by WebSphere® Studio Workload Simulator. The key items that were used for throughput are Page element throughput, Transactions throughput, and HTTP average page element response time.

Cumulative statistics are printed every five minutes and at the end of the WebSphere Studio Workload Simulator execution time interval, which was set to 1200 seconds for each of our measurements.

=========================Cumulative Statistics========================== 
IWL0038I Run time = 00:15:02 
IWL0007I Clients completed = 0/30 
IWL0059I Page elements = 629404 
IWL0060I Page element throughput = 697.325 /s 
IWL0059I Transactions = 521099 
IWL0060I Transaction throughput = 577.332 /s 
IWL0059I Network I/O errors = 0 
IWL0059I Web server errors = 0 
IWL0059I Num of pages retrieved = 629404 
IWL0060I Page throughput = 697.325 /s 
IWL0060I HTTP data read = 5657.374 MB 
IWL0060I HTTP data written = 240.236 MB 
IWL0060I HTTP avg. page element response time = 0.041 
IWL0060I HTTP avg. page element response time = 0.041
        (with all clients concurrently running) 
======== S h a r e d   V a r i a b l e   R e p o r t ======== 
int curClient = 358 
==== E n d   S h a r e d   V a r i a b l e   R e p o r t ====