SQL 服务器 - 查询以检查内存设置

Question

我可以知道如何从其中一个数据库（查询）检查 SQL 服务器中的以下当前设置

内存中 OLTP 存储 (GB)
目标 IOPS (64 KB)
副本数量

谢谢

Answer 1

一组最佳的动态管理视图查询由 Glenn Berry 创建。当然，DMV 因 SQL 服务器的版本而异。因此，您必须运行分别针对您的 2008 和 2012 版本进行正确的查询。

存储空间：

SELECT physical_memory_in_use_kb/1024 AS [SQL Server Memory Usage (MB)],
       locked_page_allocations_kb/1024 AS [SQL Server Locked Pages Allocation (MB)],
       large_page_allocations_kb/1024 AS [SQL Server Large Pages Allocation (MB)], 
       page_fault_count, memory_utilization_percentage, available_commit_limit_kb, 
       process_physical_memory_low, process_virtual_memory_low
FROM sys.dm_os_process_memory WITH (NOLOCK) OPTION (RECOMPILE);

所有数据库属性，包括它们是否是副本

-- Recovery model, log reuse wait description, log file size, log usage size  (Query 31) (Database Properties)
-- and compatibility level for all databases on instance
SELECT db.[name] AS [Database Name], SUSER_SNAME(db.owner_sid) AS [Database Owner], db.recovery_model_desc AS [Recovery Model], 
db.state_desc, db.containment_desc, db.log_reuse_wait_desc AS [Log Reuse Wait Description], 
CONVERT(DECIMAL(18,2), ls.cntr_value/1024.0) AS [Log Size (MB)], CONVERT(DECIMAL(18,2), lu.cntr_value/1024.0) AS [Log Used (MB)],
CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT)AS DECIMAL(18,2)) * 100 AS [Log Used %], 
db.[compatibility_level] AS [DB Compatibility Level], db.page_verify_option_desc AS [Page Verify Option], 
db.is_auto_create_stats_on, db.is_auto_update_stats_on, db.is_auto_update_stats_async_on, db.is_parameterization_forced, 
db.snapshot_isolation_state_desc, db.is_read_committed_snapshot_on, db.is_auto_close_on, db.is_auto_shrink_on, 
db.target_recovery_time_in_seconds, db.is_cdc_enabled, db.is_published, db.group_database_id, db.replica_id,
db.is_encrypted, de.encryption_state, de.percent_complete, de.key_algorithm, de.key_length
FROM sys.databases AS db WITH (NOLOCK)
INNER JOIN sys.dm_os_performance_counters AS lu WITH (NOLOCK)
ON db.name = lu.instance_name
INNER JOIN sys.dm_os_performance_counters AS ls WITH (NOLOCK)
ON db.name = ls.instance_name
LEFT OUTER JOIN sys.dm_database_encryption_keys AS de WITH (NOLOCK)
ON db.database_id = de.database_id
WHERE lu.counter_name LIKE N'Log File(s) Used Size (KB)%' 
AND ls.counter_name LIKE N'Log File(s) Size (KB)%'
AND ls.cntr_value > 0 
ORDER BY db.[name] OPTION (RECOMPILE);

I/O

-- Get I/O utilization by database (Query 35) (IO Usage By Database)
WITH Aggregate_IO_Statistics
AS (SELECT DB_NAME(database_id) AS [Database Name],
    CAST(SUM(num_of_bytes_read + num_of_bytes_written) / 1048576 AS DECIMAL(12, 2)) AS [ioTotalMB],
    CAST(SUM(num_of_bytes_read ) / 1048576 AS DECIMAL(12, 2)) AS [ioReadMB],
    CAST(SUM(num_of_bytes_written) / 1048576 AS DECIMAL(12, 2)) AS [ioWriteMB]
    FROM sys.dm_io_virtual_file_stats(NULL, NULL) AS [DM_IO_STATS]
    GROUP BY database_id)
SELECT ROW_NUMBER() OVER (ORDER BY ioTotalMB DESC) AS [I/O Rank],
        [Database Name], ioTotalMB AS [Total I/O (MB)],
        CAST(ioTotalMB / SUM(ioTotalMB) OVER () * 100.0 AS DECIMAL(5, 2)) AS [Total I/O %],
        ioReadMB AS [Read I/O (MB)], 
        CAST(ioReadMB / SUM(ioReadMB) OVER () * 100.0 AS DECIMAL(5, 2)) AS [Read I/O %],
        ioWriteMB AS [Write I/O (MB)], 
        CAST(ioWriteMB / SUM(ioWriteMB) OVER () * 100.0 AS DECIMAL(5, 2)) AS [Write I/O %]
FROM Aggregate_IO_Statistics
ORDER BY [I/O Rank] OPTION (RECOMPILE);

如果你想变得更花哨，并且真正看到关于你的服务器的事情以及一些关于可能出错的事情的警告，那么我会使用 Brent Ozar's sp_Blitz。它在那里被大量记录，所以只需给它一个运行并对结果流口水。

Answer 2

对于内存中 OLTP，我编写了一个脚本来评估内存优化实例和数据库，称为 sp_BlitzInMemoryOLTP，它是 Brent Ozar 的 First Responder Kit 的一部分。

https://www.brentozar.com/thanks/welcome-sql-server-medical-school/

此处的文档：http://nedotter.com/archive/2018/06/new-kid-on-the-block-sp_blitzinmemoryoltp/

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