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#Sap crystal reports runtime engine for net framework 4.0 license#
There is no guarantee that the first thread that is blocked will be the first thread that is serviced when a free license becomes available. The change in order for the 12 thread scenario is a reflection of threads being queued up until a free license becomes available. Any additional threads are blocked until a free thread becomes available.Īssuming there are request for 20 reports to be processed in order from 1 to 20: When spawning as many as 12 threads, the engine can only service 3 of these concurrently. When setting the application to match the allowed concurrent threads, almost all reports completed in 3 seconds or less. Time (per report) to print 200 reports on a Dual CPU machineįrom the Figures above, it is clear that when running 12 threads on either a single or dual processor machine, about 15 to 20% of reports took over 10 seconds to complete. Time (per report) to print 200 reports on a Single CPU machineįig 2. The following Figures show the amount of time (in seconds from the time a report is opened to the time it is closed) for a report to be printed by an application running either 3 or 12 threads on both 1 and 2 CPU servers.įig 1. NET runtime supporting a maximum of 3 concurrent threads per process and on the fact that the reporting engine is tuned to share hardware with an application such that it does not spawn threads at a rate that will consume all CPUs on a typical modern server. The results showed that adding threads and CPUs caused degradation in performance due to thread blocking. The application used in this test processed from 1 to 16 threads using a server with 1, 2, 4 and 8 CPUs.
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Tests were performed using the Crystal Reports Component Engine ( In-process RAS) to print reports using different combinations of Threads and number of CPUs on the processing server. Testing SAP Crystal Reports in a Multi-threaded Application Test 1 However more licenses can be obtained with SAP Crystal Reports Server and SAP BusinessObjects BI Platform 4.0. Note that the message is misleading in that it is not possible to purchase more licenses for SAP Crystal Reports. More licenses can be purchased direct from Crystal Decisions or through the Crystal Decisions Online Store. The event Viewer will display the following warnings regarding queued requests:Ī Crystal Reports job was delayed x second waiting for a free license to become available. a report completes processing, be it view, export or print. Subsequent requests will be queued up and processed when a license becomes available. Meaning three requests for a report processing will be accepted at the same time.
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Under this model, the engine is limited to three CPL. The SAP Crystal Reports Engine is uses the Concurrent Processor License (CPL) model. SAP Crystal Reports and the Concurrent Processor License Model This Document discusses technical details and consequences of using threads when working with Crystal Reports. Threading should theoretically improve or speed up performance of the SAP Crystal Reports Engine. On occasion it is tempting to employ threading in an application that uses the SAP Crystal Reports Engine to process reports.
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Test results show that for most applications, threading has limited value and may even appear to negatively impact performance. The behavior of the SAP Crystal Reports Engine in a multi-threaded application is explained in this document. This document explains the details and ramifications of threading when using the SAP Crystal Reports engine. As the SAP Crystal Reports engine uses the three Concurrent Processor License model, creating a multithreaded application should theoretically increase report processing performance.