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I don't believe you can get that exact statistic but you can pull average transactions per second using "application configure ise" from the cli and choosing option 12. You can then copy the files off box using scp or ftp to examine them.
ise-new/admin# application configure ise Selection configuration option Reset M&T Session Database Rebuild M&T Unusable Indexes Purge M&T Operational Data Reset M&T Database Refresh Database Statistics Display Profiler Statistics Export Internal CA Store Import Internal CA Store Create Missing Config Indexes Create Missing M&T Indexes Enable/Disable ACS Migration Generate Daily KPM Stats Generate KPM Stats for last 8 Weeks Enable/Disable Counter Attribute Collection View Admin Users Get all Endpoints Enable/Disable Wifi Setup Reset Config Wifi Setup Establish Trust with controller Reset Context Visibility Synchronize Context Visibility With Database Generate Heap Dump Generate Thread Dump Force Backup Cancellation Exit 12 You are about to generate Daily KPM (Key Performance Metrics). % Warning Generating KPM stats may impact ISE performance during the generation of the report.It is suggested to run this report during non-peak hours and when not conflicting with other scheduled operations of ISE. Are you sure you want to proceed? y/n [n]: y Starting to generate Daily KPM stats Copying files to /localdisk Completed generating daily KPM stats. You can find details in following files located under /localdisk KPM_onboarding_results_31_MAY_2018.xls KPM_trx_load_31_MAY_2018.xls
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