sql server slow

Tags: Microsoft CTI object Complex problem: Lis use parameter BinThis article belongs to theUnderstand the mysteries of performance-slow in applications, fast in SSMS"seriesNext: Understanding the Mysteries of performance-application slow, SSMs fast (5)--case: How to deal with parameter sniffing We put aside the argument sniffing topic and went back to the original point of concern in this series: Why is th

There are many causes for slow query speed of SQL Server databases. The following are common causes: 1. No index or no index is used (this is the most common problem of slow query and is a defect in programming) 2. Low I/O throughput, resulting in a bottleneck effect. 3. the query is not optimized because no computing

There are many reasons for slow query speed in SQL Server databases. The following are common causes: 1. No index or no index is used (this is the most common problem of slow queryProgramDesign defects) 2. Low I/O throughput, resulting in a bottleneck effect. 3. the query is not optimized because no computing col

An attractive service for RDS is to provide users with a slow log health report. Reports provide TOP20 SQL for users from different dimensions (total execution time, total execution times, total logical reads, total physical reads). RDS hopes to provide users with stable, fast service, while users can get more personalized optimization recommendations from RDS.This information is important, and users can ta

allowed fetch operation and is the default. Scrollable can randomly fetch any row anywhere in the cursor. The technique of cursors becomes very powerful under SQL2000, and his purpose is to support loops.There are four concurrency options READ_ONLY: The cursor is not allowed to locate updates (update), and there are no locks in the rows that make up the result set.Optimistic with ValueS: Optimistic concurrency control is a standard part of transaction control theory. Optimistic concurrency cont

There are many reasons for slow query speed in SQL Server databases. The following are common causes: 1. No index or no index is used (this is the most common problem of slow query and is a defect in programming) 2. Low I/O throughput, resulting in a bottleneck effect. 3. the query is not optimized because no computing

Does anyone know why it is so slow to connect SQL Server with thinkphp? Configuration succeeded, wrote a method can fetch data, but particularly slow, the web has been in the circle, what is the matter? Reply content: Does anyone know why it is so slow to connect

Original: SQL Server transactional replication distribution to subscription synchronization slowRecently found that there is a release frequently problems, every few days the error is not synchronized, prompting the request to initialize. After you re-adjust the synchronization, the copy is still slow! 5 million or 6 million orders are not distributed every day!

Refresh_vendor_prefix] Warning Code: ' + cast (@ @error as nvarchar) + ' Warning Lines: ' + cast (error_line () as nvarchar) + ' Warning Msg: ' +error_message () ') END CATCH3: Then the C # program runs slowly, but oddly enough, if you run this stored procedure separately in SQL Server Management Studio, it's fast,4: Can not find the cause of the problem, and then all the stored procedure is called the cod

Do not know how to solve, so put his space on the server also installed a MySQL, to solve the problem, today there is a problem, you can not also install a MySQL on this server, Search: PHP remote connection MySQL slow, sometimes remote connection to MySQL time 4-20 seconds, local connection MySQL normal, the main reason for this problem is that the default insta

Today, I encountered a strange problem in configuration: 192.168.x.x, the operating system win2008x64sp1, and the database sqlserver2008 phenomenon: SQL Server query, the local machine is normal, other machines in the same network segment, the query speed is very slow (login is fast, 250 records of small table query time close to 30 seconds) solution: After query

Tags: recompile exe http style proc Avoid log comFrom: http://blog.csdn.net/pgbiao/article/details/22388945 Cause Analysis:Because the stored procedure is precompiled, the execution plan is generated at the time of the first execution and is executed at a later time, using the execution plan (unless the stored procedure or the display specifies recompilation) instead of generating the execution plan each time it executes.The stored procedure should be recompiled when the object structure involv

The database has been slow. I executed this statement two days ago to recreate all indexes. EXECsp_MSForEachTableALTERINDEXALLON? REBUILDWITH (PAD_INDEXOFF, STATISTICS_NORECOMPUTEOFF, ALLOW_ROW_LOCKSON, ALLOW_PAGE_LOCKSON, SORT_IN_TEMPDBOFF, ONLINEOFF) The database has been slow. I executed this statement two days ago to recreate ALL indexes. EXEC sp_MSForEachTable 'alter INDEX ALL ON? Rebuild with (PAD_IN

Tags: using SP c SQL R server CA storage DIn the case of CallableStatement parameter assignment or value, it is recommended to use the index number directly, avoid using the parameter name!With the parameter name, JDBC automatically executes the exec Sp_sproc_columns stored procedure each time the stored procedure is called, obtaining the corresponding parameters for the specified stored procedure.I don't k

Tags: index solution based on keyword har results in SQL Server failure efficiencyProblem: There's a lot of data on both tables. The A1 field in a table needs to be associated with the B table primary key query A1 field stores multiple B table primary keys The format is: Format 1:B1,B2,B3 Format 2:B4 Format 3:b5,b6 Comma-delimited minority This leads to the use of like '%...% ', charindex, or replace (A1,B1

My device on the 2000 data per second into the database, 2 devices a total of 4,000, when inserted in the program directly with the INSERT statement, the two devices at the same time to insert about a total of about 2,800, data loss about 1200 or so, testing a lot of methods, Two obvious solutions are put in effect: Method One: Use SQL Server functions: 1. Combine the data into a string, use a function to

Problem Description: My device per second data inserted into the database,2 devices A total of 4000, when in the program directly with the insert When the statement is inserted, the two devices are inserted at the same time about a total of about 2800 , data loss about about Three, find a lot of solutions, Two obvious solutions are collated:The first type: Use SQL Server function :1. Combine the data in

This is a question asked by a netizen In the QQ Group I joined. He said that an INSERT operation on a table will time out. Confused. Ask for help from people in the group. I just knew something about this and answered the question about optimizing the clustered index. He does not understand how to do it, and does not seem to know what a clustered index is. I told him that you can check whether there are many disk IO records when you insert records. He said that his disk has been replaced by RAID

Tags: self-increment field creat res values PID proc where whileThe table is the 5 field int type, the first field is the primary, the self-increment field Table structure: ID int UncheckedBillno bigint Uncheckedopid int Checkedbillopid int Checkedtag int Checked Stored procedures: CREATE proc [dbo]. [Inbill]@bills bigint,@bille bigint,@billopid int,@result int OUTPUT,@incount int OutputAsBeginSet @result = (select COUNT (*) from Bill where Billno >= @bills and BillnoSet @incount = 0If @result

Tags: Select order BY statement Ros BST STR text set workerSELECT(total_elapsed_time/execution_count)/1000 N ' Average Time MS ', total_elapsed_time/1000 N ' total time spent MS ', total_worker_time/1000 N ' Total CPU time MS ', total_physical_reads N ' total number of physical reads ', Total_logical_reads/execution_count N ' Each logical read count ', Total_logical_reads N ' logical read total number of times ', Total_logical_writes N ' logical write total number of times ', Execution_count N '