![]() Problems may cause a TDS packet to be partially changed and to replay garbage to SQL Server. This problem has triggered various SQL Server stability problems and in data corruption. Even 100 CPU cycles at this location may significantly reduce batch rate throughput.Ī change in the actual TDS data may lead to memory scribblers. The detour is added at a critical location at the net_readdata network process thread. Incoming network traffic (TDS) packets are scanned and changed. The following are some example situations and possible side effects: This activity may change the behavior of SQL Server. Typically, when a detour is implemented in SQL Server, third-party code is injected into the process space. More informationĭetours provide enhanced capabilities and a risk/reward tradeoff. Microsoft is not responsible for any issues that are caused by your use of third-party products or services in connection with SQL Server. If you have any questions about third-party products and services, please reach out to the applicable third party. Instead, third-party vendors are responsible for the identification and trustworthiness of their products and services. Microsoft does not warrant or certify these third-party products or how the third-party products interact with Microsoft products and services. A detour from a reputable and trusted company is definitely different from an unexpected detour that is used by a virus. However, Microsoft requires you to validate the supportability of the detours. Microsoft acknowledges that some implementations are necessary. It is not our intention to uncover a detour and then consider the instance of SQL Server to be unsupported. After the issue is identified as unrelated to the jobs or third-party products, those jobs or third-party products may be introduced back into production. Microsoft always tries to reduce the footprint of the issue while it is identifying the problem. It is common practice, in the usual course of troubleshooting, for Microsoft support services to ask you to disable nonessential jobs and to disable or remove third-party components and other, similar techniques. The third party is responsible for support of its own code, just as it would be responsible for its own linked server or other sanctioned deployment. Linked servers, COM objects, and extended procedures have explicit registration and defined interfaces.īecause of the hidden nature of detours and the lack of published interfaces, Microsoft does not provide support services for third-party features that use detours or similar techniques. To uncover a detour, you must use the techniques that are described in the More Information section that follows. You may encounter these same issues when you are using non-Microsoft software such as linked servers, extended procedures, or COM objects within the SQL Server process. 100 percent CPU utilization and long database recovery times when you use in-memory OLTP tables in SQL Server.Inability to use standard diagnostics, such as the fn_get_sql function and the DBCC INPUTBUFFER command.Therefore, generally, Microsoft strongly discourages the use of detours.įeatures that use detours or similar techniques to change the behavior of SQL Server may cause the following issues: There is no certification process for third-party detours for Microsoft applications. These are usually auditing functionalities. Microsoft support has encountered numerous third-party products that use detours to provide additional functionalities to SQL Server. Original product version: SQL Server Original KB number: 920925 Summary ![]() This article describes Microsoft support policy when you use third-party detours with SQL Server and issues that may occur when you use them.
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