find deadlock in sql server

returned, the stored procedure is used.　　 42. Do not use the same function repeatedly in one sentence, waste resources, and put the result in a variable before calling it faster.　　 43. The efficiency of select count (*) is low. Try to change the method while exists is fast. Note the difference: Select count (FieldOf null) from table and select count (field of not null) from tableThe returned values are different !!!　　 44. When the server has enough m

: Blocking. Usually majority of stacks on your threads would has lockowner::sleep () function and lck_lockinternal: ntdll! Zwsignalandwaitforsingleobject kernel32! SignalObjectAndWait sqlservr! Sos_scheduler::switchcontext sqlservr! Sos_scheduler::suspend sqlservr! Sos_event::wait sqlservr! Lockowner::sleep sqlservr!lck_lockinternal sqlservr! Getlock Buffer Pool Memory Issue or Lazy Writer IO waits–look for sqlservr! Bpool::steal calls sqlservr! Bpool::ste

Label:Original: SQL Server Tuning Series advanced (in-depth profiling statistics)ObjectiveAfter the analysis of the previous few, in fact, in general has been the first glimpse of the importance of SQL Server statistics, so this article will be sacrificed this artifact.This content will be very long, sit good bench, me

transactions so that another transaction can be successfully completed. Generally, it is to undo the transaction that modifies the amount of data, so the cost of rolling back is less. A database that uses row-level locks rarely has this problem, since two users are less likely to modify the same record at the same time, and there are fewer locks due to the extremely accidental modification of the data. Also, the database uses a lock timeout to avoid allowing the user to wait too long. The quer

content in Chapter "lock and concurrency" in "Inside SQL Server 2005: The Storage Engine 8th" written by Kalen Delaney (see references in this book: other resources and references ). specifically, that chapter contains the required information about SQL Server 2005 transactions, isolation levels, locks, and other cont

AJAX. 6. Database The database is the focus of my optimization. Because it is a database of SQL Server 2000, there is no DMV, no performance monitor for SSMS, no indexes included ...... There are too many useful functions, which is very inconvenient. In general, I think the optimization of database performance is mainly in three directions: Optimize the index and create the index to Remove unused index

the database server through the Web or application server, it only needs to modify the SQL client alias on the Web or application server, and all clients are redirected to the secondary server。13.5 Delete log Shipping13.5.1 Deleting log shipping through Management StudioThe

ObjectiveAfter the analysis of the previous few, in fact, in general has been the first glimpse of the importance of SQL Server statistics, so this article will be sacrificed this artifact.This content will be very long, sit good bench, melon seeds snacks and so on ...No nonsense, go to the chase.Technical preparationThe database version is SQL SERVER2008R2, whic

RAID0, and SQL2000 is not supported. The larger the data size (size), the more important it is to increase I/O.2. vertical and horizontalSplit the table to reduce the table size.(Sp_spaceuse)3. upgrade hardware4,Create indexes, optimize indexes, and optimize access methods based on query Conditions,Limit the data size of the result set. Note:Fill factor should be appropriate(It is best to use the default value 0 ). The index should be as small as possible,Index Using a column with a small numbe

Label: SQL Server Query optimization method The reasons for the slow query are many, the following are common 1, no index or no index (this is the most common problem of slow query, is the defect of program design)2, I/O throughput is small, forming a bottleneck effect3. No computed column created causes query not to be optimized4. Insufficient memory5. Slow network speed6, the amount of data queried is too

deployed. Since the stored procedure is written by colleagues in the way of SQL 2000, the first thing I think of is to use the new T-SQL statement function in SQL Server 2005-try/Catch Block instead. The try catch structure is similar to the classic structure in C. For more information about try/catch, see "use try/ca

related issues (problems with column correlations) 16th Week cardinality estimates in SQL Server 2014 (cardinality estimation in SQL Server 2014) 5th Month: Lock, block, deadlock As a developer or database administrator so far, your life is still pea

locks an existing record, it does not use a Range lock. We still take the stored procedure as an example, so that only two locked rows of data on the same page (because the page-level lock is used by default), or close enough to be able to deadlock, and this deadlock is limited to records on this data page without affecting other records, so the probability of deadlock