SQL Server is the most important application of Windows system like any other program. It plays a vital role with cooperative scheduler and helps to share CPU and other resources. It can handle and execute multiple tasks simultaneously that means SQL Server lets take its turn to the host. While executing queries and running SQL environment on a regular basis SQL Servers might face performance issues. Some of the issues are bad queries, slow processing, indexes with more writes and reads, memory or CPU issues. Therefore, in the upcoming section, we are going to discuss SQL Server performance issues and its solution.
Common SQL Server Performance Issues & Solutions:
Here, we are going to discuss the following SQL Performance issues and how to get rid of them. Let’s have a look:
Issue 1: Query Taking Long time than usual processing
This issue may occur due to resource contention from locking. The issue arises when a new process is getting added to your computer system, or the system load gets increased.
You can resolve the issue by fixing this problem via Query Analyzer and SP_WHO2 command. You can check BlkBY field in the results of a command which shows offending SPID numbers as a result if they are already blocked. You can follow a large chain of blocks to find out head. You can also use DBCC inputbuffer command to display SQL statement that SPID is running. To do this, you might be able to find out the cause and resolution of this problem.
Issue 2: Database may face out of space error
It happened several times you receive messages that the database is running out of space. There might be two reasons behind the occurrence of this issue, firstly, physical drive that stores the database, or the transaction log file out of space. To fix this issue, test the disk for any file that is growing rapidly or some other issues. Secondly, database or the transaction log file contains maximum size. To solve this case, you need to increase the limit to permit the database operation. The other reason that takes place when tempdb log is full.
To overcome this problem, restart MS SQL service and it will recreate the tempdb from scratch. Keep in mind that tempdb file has a maximum size and increase the file size if necessary to avoid this kind of issue.
Issue 3: Client loses connection to the SQL Server
SQL Server connection issue is not very common but, if it occurs, then it usually blocks the SPID to hold a lock on the resource while waiting for timeout. This is the major issue in SQL client running the previous version of Microsoft Access.
To troubleshoot this problem, use SP_WHO2 and KILL commands to delete the orphaned process from SQL server. Another way to fix this issue is that decrease client connection timeout, this will lead server to kill the orphaned processes quickly and easily.
Issue 4: Complete system goes to a Deadlock state
If you are getting the error message that says “you are in deadlock state” and the system that suffered from deadlocking. So, the system is entering in a deadlock state when two or more queries in SQL, each locking resources and none of them is finished. When deadlock state issue gets resolved SQL log file will report the situation. Moreover, SQL server log is the best place to verify whether the issue has been resolved or not
One of the simplest methods to solve problem is turning ON trace flag-t1204, it will provide the complete information in the log. You will have to determine the contention level on the server.
Time to Conclude
SQL Server performance and database consistency checks are important to keep the server always up and run smoothly. Users should always manage regular backups, check SQL services and monitor resources. If users might face issues such as corrupt MDF/ NDF files or SQL database files are inaccessible, it is always recommended to use a commercial solution, i.e. SQL Repair Tool. It is designed in such a way to repair corrupt database of SQL server without facing any difficulty.