I have 6xSSRS 2014 servers running same set of reports. All reports point to the same SQL Server 2008 Database. All reports call SP in database server to get result back and render. Report are running fine in SSRS 2005 before move to SSRS 2014. When call the same report, sometime response very quick , sometime very slow. We notice that when report is slow response (loading) , %CPU of report server is 0% , it will 0% for a while and the spike up (and then report is being display). This happen all the time during working hours. Each report server got about 400-1,000 session during working hours.At first, we move from SSRS 2005 to SSRS 2014 SP1, we experience the service halt after certain amount of load (the same load on SSRS 2005), manually reset service is work around at that time. After update to SSRS 2014 SP1 CU2 , just not need to manual reset the service it will comeback after a while (CPU 0%) like the symptom described in first paragraph.Anybody experience this kind of problem, please helpmany thanksKen
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