sql server maintenance cleanup task

update the statistics,For a 5000W row table, you can specify that the changes exceed 60W rows (customized according to business conditions), and manually update the statisticsAt the same time, depending on the table, on the relatively small table, specify a relatively high percentage of samples, on a relatively large table, specify a relatively low sampling percentageFor example, for 1000W rows of the table, the time to update the statistics of the sampling percentage position 60%, for the 5000

First, the preface SQL Server Backup and restore strategy, which includes a graphical guide to restoring various backup files through the SSMs operation, a minimal downtime migration solution for SQL Server databases, which uses SQL scripts (t) to complete full backups, dif

function accepts a parameter, establishes a connection with the server, and then executes the sp_dropsrvrolememeber system stored procedure. # Remove BUILTIN\Administrators from sysadmin rolefunction rmba ($s){$svr="$s"$cn = new-object System.Data.SqlClient.SqlConnection"server=$svr;database=master;Integrated Security=sspi"$cn.Open()$sql = $cn.CreateCommand()$sv

Settings dialog box, select the time of retention, more than the retention time, the full backup record will be deleted. 19, double-click the "Clear Maintenance" box, pop Up the Settings dialog box, choose the time of retention, more than the retention time, the full backup file will be deleted, note the path to set the backup file, and the extension bak, not. bak. 20, after the setup is complete, this is the case. 21, the following two sub-plans,

First, backgroundPreviously wrote an article about backup: SQL Server maintenance plan to implement database backup, the above article using full backup and differential backup basically can solve the problem of database backup, but in order to protect the data more secure, we need to perfect our backup plan again;The following article mainly joins the log backup

change the original table to the online table has been modified failed. After you temporarily disable SQL Server account, you can modify the name of the table.Analysis: There is a schema-stable lock during SQL execution, and it is easy to modify the data structure failure for highly concurrent access tables. It is recommended that you temporarily stop the busine

SQL ServerHorizontal scaling: Design, implementation and maintenance (3)-distributedPartitionView implementation In the previous articleArticle, We have already mentionedDistributed partition ViewThe linked server technology is used for implementation, and the implementation principle is also roughly described.Internal MechanismSo far, our series aims to practi

Tags: directory maintenance guideSQL Server 2014 installation and Configuration guideChapter Catalogue"SQL Server 2014 management and Maintenance"1th. Achieving data integrity and consistency1.1 Data integrity1.2 Data consistency1.3 Blocking and deadlocksThe 2nd chapter cont

of requests for full index scans per second or full table scans per second. If the scan frequency is greater than 1 per second, the index is missing or the index is poor. 3.2.5. SQL serveraccess methodspagesplits/sec displays the number of page splits per second. It can be avoided through proper index maintenance or good fill factor. 3.3. CPU 3.3.1. systemprocessor Queue Length indicates the system queue l

recovery, and differential recovery; With the above foundation, we have added database backup elements to generate database backup files through maintenance plans. These include two types of files: Full backup and differential backup of the database, with these two files, we can use SQL Server backup and restoration full strategy (Graphic operations) or

Indeed, database maintenance is often given to professional database administrators, but as a developer, you may occasionally need to do this work temporarily. So, try these two SQL Server maintenance tips: Easily change the database owner, defragment the index. Who would have thought you could even teach one or two ne

Indeed, database maintenance is often given to professional database administrators, but as a developer, you may occasionally need to do this work temporarily. So, try these two SQL Server maintenance tips: Easily change the database owner, defragment the index. Who would have thought you could even teach one or two ne

Introduction On Windows, SQL Server OS is a user-level operating system level used to serve SQL Server. It abstracts some functions of the operating system from the entire SQL Server engine and forms a separate layer to provide se

Introduction On Windows, SQL Server OS is a user-level operating system level used to serve SQL Server. It abstracts some functions of the operating system from the entire SQL Server engine and forms a separate layer to provide

Brief Introduction SQL Server OS is a user-level operating system hierarchy on top of Windows that serves SQL Server. It abstracts the functionality of the operating system part from the entire SQL Server engine and forms a separ

operations. This is called the reaching. But note that some additions and deletions with a where condition, in these cases, some indexes can improve performance, such as the millions of the table to delete a row of data, if there is no index (assuming that even the clustered index does not), then only scan the entire table delete, in the formal environment to try to know, the speed is simply unacceptable. Too many indexes also cause the database to "volume" to become larger. In essence, the p

Tags: statistics autostats auto_update_statisticsSelection of SQL Server statistics Maintenance policyProblem Description:After archiving a tens of millions of tables in an OLTP system, the business application receives a timeout alert when the source table data is deleted in batches, as follows:V1.1.1.1: ****process-querytransactionfor****: 23075129 Timeout expi

SQL Server backup and restoration raiders, which includes through SSMS operation to restore a variety of backup files graphics guide, SQL Server database minimum downtime migration solution, which uses SQL script (T-SQL) complete

Summary of SQL SERVER partition tables-Maintenance and Management of partition tables After creating a partition table as required, you must manage and maintain the partition table. The main content is: 1. Use the Sliding Window Scenario solution to split partition tables and data moving intermediate tables. 2. Structure Change Management of Partitioned Tables.

=pc.index_idWHEREPs.avg_fragmentation_in_percent> Ten andIx.name is not NULL Execution Result:Execute the generated SQL statement:ALTER INDEX [PK__GD_MOVEB__1489BC61D65FF2AA] on [dbo].[Gd_movebarcode_detail]REBUILDGoALTER INDEX [Pk_branchstylealldata] on [dbo].[Branchstylealldata]REORGANIZEGoALTER INDEX [pk_pubbranchlocation_1] on [dbo].[pubbranchlocation]REBUILDGo5. Rebuilding the entire library's statisticsExec sp_updatestats;6. View