SQL Server Performance tuning and query optimization interview questions| Performance tuning SQL

SQL Server Performance tuning and query optimization interview questions| Performance tuning SQL

SQL Server Performance Tunning

In This session we are covering SQL Server Performance Tunning

How to handle SQL Server Slowness
How to handle sql server performance issues.
what all basic step needs to follow before work on Tunning
Real time sql server tunning
Increase sql server performance.

sql performance tuning
indexes in sql
performance tuning in sql server
sql server dba
sql server index

#sqlserver
#sqlqueries
#dbadoctors
@DBADoctors
#sqlperformance
#SQLTunning
#sqltutorial

#SQLPerformanceTuning
#DatabaseOptimization
#QueryOptimization
#DatabasePerformance
#Indexing
#ExecutionPlan
#DatabaseAdministration
#SQLServerPerformance
#MySQLOptimization
#OraclePerformanceTuning

SQL Server performance tuning

SQL tuning is the process of enhancing SQL queries to speed up the performance of your server. Its main goal is to shorten the time it takes for a user to receive a response after sending a query and to utilize fewer resources in the process. The idea is that users can occasionally produce the same intended result set with a faster-running query.

SQL performance tuning is speeding up queries against a relational database.

Database optimization

Databases can store tremendous amounts of information, petabytes of information.
Specific bits of data are accessed by queries written in a particular interface language, such as SQL.
Database optimization involves maximizing the speed and efficiency with which data is retrieved.

Query optimization

SQL stands for Structured Query Language which is used to interact with a relational database. It is a tool for managing, organizing, manipulating, and retrieving data from databases. SQL offers amazing advantages like faster query processing, highly portable, Interactive language, cost-efficient, and many more. When data needs to be retrieved from SQL a request is sent. The DBMS processes the requests and returns them to us.

Indexing

Indexing is a way to optimize the performance of a database by minimizing the number of disk accesses required when a query is processed. It is a data structure technique which is used to quickly locate and access the data in a database.

Indexes are created using a few database columns.

Execution plan

SQL Server Management Studio is a graphical representation of the various steps that are involved in fetching results from the database tables. Once a query is executed, the query processing engine quickly generates multiple execution plans and selects the one which returns the results with the best performance. There are two types of execution plans to be specific

Database administration

What Does Database Administration Mean? Database administration refers to the whole set of activities performed by a database administrator to ensure that a database is always available as needed.

SQL Server monitoring
SQL server monitoring is the continuous or real-time gathering and analysis of performance, resource utilization, usage, and event metrics of a database server. In addition to identifying performance problems, inadequate or underutilized resources, and other issues, it provides insights that admins can use to fine-tune and enhance the performance.

Database performance metrics

SQL Server Database Metrics
October 2, 2019 by Ed Pollack
ApexSQL pricing
Summary
There is a multitude of database metrics that we can collect and use to help us understand database and server resource consumption, as well as overall usage.

This data can include hardware statistics, such as measures of CPU or memory consumed over time. We can also examine database metadata, including row counts, waits, and deadlocks.

At face value, this information can be useful in capacity planning and alerting when a server is low on resources. Our goal in this article an in Using Database Metrics to Predict Application Problems article will be to collect a handful of useful database metrics and then demonstrate how we can use them to benefit app development, troubleshooting, and bug hunting!

What Database Metrics Do We Monitor?
There is a multitude of database metrics we can monitor that will provide insight into how our server and data are being managed. Some are more useful than others and for different applications, some metrics may be more applicable than others.

SQL Server troubleshooting
I/O issues in SQL Server
Network issues in sql server
Memory issues in sql server
CPU issues in sql server
Performance issues in sql server

Query profiling

The query execution statistics profile infrastructure, or standard profiling, must be enabled to collect information about execution plans, namely row count, CPU and I/O usage.