mod_ WSGI + pymssql path SQL server seat

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by pymssql access SQL Server moment , directly python Implementation without problems . by mod_wsgi and Apache When deployed . All requests are found hang Then query the database .

adopt google Found the answer , thank google, Please refer to ：https://code.google.com/p/modwsgi/wiki/ApplicationIssues#Python_Simplified_GIL_State_API

Briefly ,mod_wsgi For each virtual host and app mount point Create a sub interpreter.python There is a famous GIL, Through C extension Visit GIL State when , There is only the first sub interpreter To work properly , Suppose you use the possible sub interpreter May cause deadlock or crash, because pymssql It's a C extension So there will be this problem , The solution is . Add configuration items ：

WSGIApplicationGroup %{GLOBAL}

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Force this app Use the first one sub interpreter, bring GIL Normal work . After finishing ,mod_wsgi everything ok.

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