改變導致SQL Azure數據庫不可用的表

Question

我必須執行兩個表的交換，它使我的系統在20分鐘內不可用（有很多數據）。

我的示例代碼：

query = "DROP TABLE MY_TABLE; "; 
query += "EXEC sp_rename MY_TABLE_TEMP, MY_TABLE; "; 
query += "ALTER TABLE MY_TABLE ADD CONSTRAINT PK_MY_TABLE PRIMARY KEY CLUSTERED (ID) WITH(STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]"; 

執行的SQL Azure數據庫對上述語句，這引起了數據庫20分鐘不可用。在這方面的任何見解？

Answer 1

您的DB在美國東部嗎？如果是的話，他們有云問題。 https://azure.microsoft.com/en-us/status/

Answer 2

Azure數據庫可以扼殺新的查詢，如果有DTU的壓力，所以我建議你檢查以下東西

1.See DTU狀態，如果任何DTU指標是90％以上一致，那麼你可能需要考慮升級到更高的層次，故障排除後，看看你是否可以減少DTU指標

SELECT 
    AVG(avg_cpu_percent) AS 'Average CPU Utilization In Percent', 
    MAX(avg_cpu_percent) AS 'Maximum CPU Utilization In Percent', 
    AVG(avg_data_io_percent) AS 'Average Data IO In Percent', 
    MAX(avg_data_io_percent) AS 'Maximum Data IO In Percent', 
    AVG(avg_log_write_percent) AS 'Average Log Write Utilization In Percent', 
    MAX(avg_log_write_percent) AS 'Maximum Log Write Utilization In Percent', 
    AVG(avg_memory_usage_percent) AS 'Average Memory Usage In Percent', 
    MAX(avg_memory_usage_percent) AS 'Maximum Memory Usage In Percent' 
FROM sys.dm_db_resource_stats; 

2.See有多大，你的表是，因爲你正在試圖改變PK，相同的值在所有非集羣進行更新索引。請看等待狀態..