sql server maintenance checklist

. These secondary databases are either readable or non-readable. It can also be updated synchronously or asynchronously. Asynchronous replicas support only manual forced failover, while synchronous replicas support automatic or manual failover. A secondary read replica can be configured to support only read-only queries, or it can make a secondary copy a place for backup and maintenance operations, thereby reducing the pressure on the primary replica.

. Therefore, during the design process, you should carefully check all the queries based on the query design principles, and design indexes based on the query optimization features. (1) narrow indexes have high efficiency. For narrow indexes, a large number of index rows can be stored on each page, and the index level is also small. Therefore, more index pages can be stored in the cache, which also reduces I/O operations. (2) the SQL

of database hosting platform is different, The Windows system might also show several g of free physical memory after one year, and the Linux/unix may take over all of the physical memory when it is started, and it's confusing when you're just learning Unix. So in Linux/unix, the process to use memory is less than the process under Windows wait for a step, so the memory page exchange overhead will be relatively small, and windows to see the rest of the physical memory, enough to get, not enough

security policies: • Users get server access through the SQL Server Users group and get database access through the Db_name Users group. • The user obtains permissions by joining the global group, and the global groups get permissions by joining the role. The role directly owns the permissions in the database. • Users who require multiple permissions get permiss

server| Security | introduction | Planning Microsoft has built a flexible and powerful security management mechanism that can manage the security of users accessing SQL Server server systems and databases. Following the steps in this article, you can build a flexible, manageable security policy for

Tag: Cloud Platform for Cloud computingAdd SQL Server resource provider in Azure stackIn the previous blog post, we deployed a node Azure Stack POC and uploaded the server image to the library. In the next section, we will deploy the MSSQL and MySQL resource providers.Here's a high-level checklist we're going to comple

SQL Server database optimization solution There are many reasons for slow query speed. 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 column is created. 4. Insufficient memory 5. slow network speed 6. The

permissions under the authority of that group or role. Comments REVOKE only applies to permissions within the current database. The revoked permission removes the granted or denied permission only on the level (user, Group, or role) of the revoked permission. For example, the Andrew user account is explicitly granted permission to view the authors table, which is only a member of the employees role. If the employees role is abolished to view access to the authors table, the account can still v

, transverse partition table, reduce the size of the table (Sp_spaceuse) 3. Upgrade Hardware 4, according to query conditions, establish index, optimize index, optimize access mode, limit the data quantity of result set. Note that the fill factor should be appropriate (preferably with the default value of 0). The index should be as small as possible, with a small number of bytes of Lie Jian index Good (reference to the creation of the index), not to a limited number of characters Jianjian a sing

SQL Server 20,165 Big Advantage Mining Enterprise user data valueReprinted from: http://soft.zdnet.com.cn/software_zone/2016/0318/3074442.shtmlMicrosoft hosted a "Data driven" event in New York, USA on March 10, and officially released a new generation of SQL Server 2016.At the same time, two explosive messages were at

you will also see suggestions to set the maximum degree of parallelism to 1. This is bad advice because this makes your "whole" SQL Server single-threaded! Even if maintenance operations (such as index rebuilds) are single-threaded, this can seriously hurt performance! Of course there are some "award winning" products indicating that you use the maximum degree o

volume is too large, maintenance of statistics may also cause minor errors. At this time, we need to make up for it in time.Create statisticsThrough the above introduction, we have seen the powerful role of statistical information, so the importance of it for the database is self-evident. Therefore, SQL Server will automatically create statistical information, u

then the next point. Issue 2: Install SQL2008, prompt to remove sql2005express tool solution In the installation of SQL2008, prompted to delete sql2005express tools, on the Internet to find a lot of information, and finally found a more convenient way, hoping to help everyone. Modify the registry: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\90\tools\shellsem, rename or delete shellsem item

also special purpose fixed database roles in the msdb database. You can add any database account and other SQL Server roles to the database-level role. Each member of a fixed database role can add additional logins to the same role.Important Notes Do not add a flexible database role as a member of a fixed role. This can cause unexpected permissions escalation. The following tab

years of careful creation, in 2005, the strong introduction of SQL Server 2005, this is since the SQL Server 2000 after another masterpiece. This enterprise-class database solution includes the following aspects: Database Engine Services, data mining, Analysis Services, Integration Services, Reporting services, Among