什么？有个 SQL 执行了 8 秒！
哪里出了问题？臣妾不知道啊，得找 DBA 啊。
DBA 人呢？离职了！！擦！！！
程序员在无处寻求帮助时，就得想办法自救，努力让自己变成 "伪 DBA"。
索引
- 获取存储过程 SP 执行次数排名
- 查看哪个 SP 执行的平均时间最长
- 查看哪个 SP 执行的平均时间最不稳定
- 查看哪个 SP 耗费了最多的 CPU 时间
- 查看哪个 SP 执行的逻辑读最多
- 查看哪个 SP 执行的物理读最多
- 查看哪个 SP 执行的逻辑写最多
获取存储过程 SP 执行次数排名
SELECT TOP (100) p.[name] AS [SP Name] ,qs.execution_count ,ISNULL(qs.execution_count / DATEDIFF(Minute, qs.cached_time, GETDATE()), 0) AS [Calls/Minute] ,qs.total_worker_time / qs.execution_count AS [AvgWorkerTime] ,qs.total_worker_time AS [TotalWorkerTime] ,qs.total_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() ORDER BY qs.execution_count DESC OPTION (RECOMPILE);
查看哪个 SP 执行的平均时间最长
SELECT TOP (25) p.[name] AS [SP Name] ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.total_elapsed_time ,qs.execution_count ,ISNULL(qs.execution_count / DATEDIFF(Minute, qs.cached_time, GETDATE()), 0) AS [Calls/Minute] ,qs.total_worker_time / qs.execution_count AS [AvgWorkerTime] ,qs.total_worker_time AS [TotalWorkerTime] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() ORDER BY avg_elapsed_time DESC OPTION (RECOMPILE);
查看哪个 SP 执行的平均时间最不稳定
SELECT TOP (25) p.[name] AS [SP Name] ,qs.execution_count ,qs.min_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.max_elapsed_time ,qs.last_elapsed_time ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() ORDER BY avg_elapsed_time DESC OPTION (RECOMPILE);
查看哪个 SP 耗费了最多的 CPU 时间
SELECT TOP (25) p.[name] AS [SP Name] ,qs.total_worker_time AS [TotalWorkerTime] ,qs.total_worker_time / qs.execution_count AS [AvgWorkerTime] ,qs.execution_count ,ISNULL(qs.execution_count / DATEDIFF(Minute, qs.cached_time, GETDATE()), 0) AS [Calls/Minute] ,qs.total_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() ORDER BY qs.total_worker_time DESC OPTION (RECOMPILE);
查看哪个 SP 执行的逻辑读最多
SELECT TOP (25) p.[name] AS [SP Name] ,qs.total_logical_reads AS [TotalLogicalReads] ,qs.total_logical_reads / qs.execution_count AS [AvgLogicalReads] ,qs.execution_count ,ISNULL(qs.execution_count / DATEDIFF(Minute, qs.cached_time, GETDATE()), 0) AS [Calls/Minute] ,qs.total_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() ORDER BY qs.total_logical_reads DESC OPTION (RECOMPILE);
逻辑读（Logical Read）主要是给 Memory 形成压力，可用于观察比较 Memory 运行情况。
查看哪个 SP 执行的物理读最多
SELECT TOP (25) p.[name] AS [SP Name] ,qs.total_physical_reads AS [TotalPhysicalReads] ,qs.total_physical_reads / qs.execution_count AS [AvgPhysicalReads] ,qs.execution_count ,qs.total_logical_reads ,qs.total_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() AND qs.total_physical_reads > 0 ORDER BY qs.total_physical_reads DESC ,qs.total_logical_reads DESC OPTION (RECOMPILE);
物理读（Physical Read）主要是给磁盘 I/O 形成压力，可以用于观察比较 I/O 运行情况。
查看哪个 SP 执行的逻辑写最多
SELECT TOP (25) p.[name] AS [SP Name] ,qs.total_logical_writes AS [TotalLogicalWrites] ,qs.total_logical_writes / qs.execution_count AS [AvgLogicalWrites] ,qs.execution_count ,ISNULL(qs.execution_count / DATEDIFF(Minute, qs.cached_time, GETDATE()), 0) AS [Calls/Minute] ,qs.total_elapsed_time ,qs.total_elapsed_time / qs.execution_count AS [avg_elapsed_time] ,qs.cached_time FROM sys.procedures AS p WITH (NOLOCK) INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK) ON p.[object_id] = qs.[object_id] WHERE qs.database_id = DB_ID() AND qs.total_logical_writes > 0 ORDER BY qs.total_logical_writes DESC OPTION (RECOMPILE);
逻辑写（Logical Write）即与 Memory 相关，也与 Disk I/O 相关。通过数据可以判断出写 I/O 最昂贵的存储过程。
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