dm_os_ring_buffers :RING_BUFFER_OOM'
;WITH rb AS (SELECT CAST (record as xml) record_xml FROM sys.dm_os_ring_buffersWHERE ring_buffer_type = 'RING_BUFFER_OOM' ) SELECT rx.value('(@id)[1]', 'bigint') AS RecordID ,DATEADD (ms, -1 *...
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Transaction Log recovery phases
https://docs.microsoft.com/en-us/azure/azure-sql/accelerated-database-recoveryI am not quite sure the design for Phase 2 Redo , why it's not start scanning from the last commit lsn ?
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How to interpret Native Compilation Advisor report
so which code is blocking this procedure to natively compile
View ArticleIndex Reorganize during Database Full Backup
Index Maintenance usually starts 3 Hours before the database full backup and ends before the Full Backup Start.The Database is in Simple Recovery Model.Last weekend the Index Maintenance took more than...
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Cost in Execution Plan summing up more than 100% , its some where 140%+
Hi AllI am using Azure SQL, while performance tuning I found one of the queries generated execution plan value more than 140%Query plan attached, Can you help me to understand if its a bug and can be...
View ArticleThe network name cannot be found at...
Hi,I have 3 Node SQL AOAG Cluster.Recently , while trying to check the Application status , I started seeing below error in previous primary (AG Replica1) where as the status is working in now primary...
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Safely stop full text catalog population?
SQL Server 2008 R2We noticed that one of our full text catalogs was incorrectly set to "Do not track changes" with a "Last population date" set months ago. As soon as we set the Track changes setting...
View Articlemax worker thread
If I have a server have 16 cores , 64 bits, can I tune max worker thread (instance setting) to 1000 ?And if calculating max worker thread will be using physical core or logical core or the CPU ?
View ArticleSQL Server soft-numa
If the server has 2 socket and each has 8 phyiscal core per each. and enable hardware numa. So SQL Server 2016 will still do the auto-software numa configuration during startup ?
View ArticleDefault trace was stopped because of an error. Cause: 0x80070057(The...
Hello, We have MS SQL server 2016 Enterprise (SP2-CU5). After starting the server, the default trace file grows to 20 MB, and then stops with this error in ErrorLog:Trace ID '1' was stopped because of...
View ArticleRecompile or DISABLE_PARAMETER_SNIFFING
If I would like to make the query to compile the plan for individual parameter, should I should recompile or DISABLE_PARAMETER_SNIFFING?What's the different ?
View ArticleMultipage allocation vs Large Pageallocation
May I know Multipage allocation vs Large Pageallocation are the same concept ?Any example of what type of Multipage allocation are?I check in my sys.dm_os_memory_clerks that column page_sizes_in_bytes...
View ArticleSQL Server resource pool MAX_MEMORY_PERCENT
MIN_MEMORY_PERCENT and MAX_MEMORY_PERCENTThese settings are the minimum and maximum amount of memory reserved for the resource pool that can not be shared with other resource pools. The memory...
View Articlesys.dm_os_memory_pools pool_id
https://docs.microsoft.com/en-us/sql/relational-databases/system-dynamic-management-views/sys-dm-os-memory-pools-transact-sql?view=sql-server-ver15By default pool_id 0 is internal pool and pool_id 1 is...
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what's actually CMEMTHREAD
https://www.sqlskills.com/help/waits/cmemthread/what's actually "TREAD-safe-memory-object" ?
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DBCC memory status Current commited
May i know if the current committed will also include stack memory allocation ? (which is not control by max server memory ) ?
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Filter index question
I am comming to this examplehttps://www.mssqltips.com/sqlservertip/2353/performance-advantages-of-sql-server-filtered-statistics/CREATE TABLE MyRegionTable(idINT, Location NVARCHAR(100), USState...
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SQL Server 2016 slower than SQL Server 2008
I have two databases with the same data, one on an SQL Server 2008 R2 instance, and one on an SQL Server 2016 instance. Both SQL Server instances are on the same machine, and the database files are on...
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