how to identify poor performance in sql server

Use this statement frequently to view poorly-performing SQL statements:SELECTCreation_time N'Statement Compilation Time', Last_execution_time N'Last Execution Time', Total_physical_reads N'total number of physical reads', Total_logical_reads/Execution_count N'each logical read Count', Total_logical_reads N'total number of logical reads', Total_logical_writes N'total number of logical writes', Execution_count N'Number of executions', Total_worker_time/

SELECTCreation_time N'Statement Compilation Time', Last_execution_time N'Last Execution Time', Total_physical_reads N'total number of physical reads', Total_logical_reads/Execution_count N'each logical read Count', Total_logical_reads N'total number of logical reads', Total_logical_writes N'total number of logical writes', Execution_count N'Number of executions', Total_worker_time/ +N'total CPU time used by Ms', Total_elapsed_time/ +N'Total time spent Ms', (Total_elapsed_time/Execution_count)/ +

Tags: causes 1.7 read data to execute disk has one other build multipleThe focus of performance optimization is to identify location problems, get a better understanding of the major performance killers, and be able to pinpoint problems faster and focus on the possible causes. The SQL

If you suspect that computer hardware is the main cause of affecting the Performance of SQL Server, You can Monitor the load of the corresponding hardware through SQL Server Performance Monitor to confirm your guesses and

In oracle, how does one determine SQL statements with poor performance? When SQL statements are involved, there are two aspects of poor performance: CPU-intensive statements (CPU-intensivestatements) and IO-intensive statements (I

necessary to identify a large number of space-occupying objects, such as: tables or indexes, and then by archiving historical data, the space is released first.2. The master data file (primary files) cannot be emptied. There are auxiliary data files that can be completely emptied.3. If you want to empty a filegroup, delete the objects (tables or indexes) assigned to the filegroup, or move them to another filegroup, DBCC Shrinkfile will not do the wor

Tags: Performance sqlQuery the worst-performing 10 sqlSELECT * FROM (select Parsing_user_id,executions,sorts,Command_type,disk_reads,sql_text from V$sqlareaORDER by Disk_reads DESC) where rownumThe hash value of the Hash_value:sql statement.The address of the Address:sql statement in the SGA.These two columns are used to identify SQL statements, and sometimes two

The former is easy to locate. All operating systems allow us to look at CPU-intensive tasks. These tasks can be traced back to a specific user, a specific application module. CPU-intensive modules are generally caused by poor code and/or structure, rather than poor performance SQL. Once you've identified the module, yo

. If you want to compress the size of the database, you must first confirm that the data file does not have the appropriate space to use. If the space is in use, it is necessary to identify a large number of space-occupying objects, such as: tables or indexes, and then by archiving historical data, the space is released first.2. The master data file (primary files) cannot be emptied. There are auxiliary data files that can be completely emptied.3. If

The former is easy to locate. All operating systems allow us to look at CPU-intensive tasks. These tasks can be traced back to a specific user, a specific application module. CPU-intensive modules are generally caused by poor code and/or structure, rather than poor performance SQL. Once you've identified the module, yo

Find the top 10 poor performance SQL.SELECT * from (SelectfromorderbyDESC ) where ROWNUMView a running session with a large IOSELECTSE.SID,SE.SERIAL#,PR. Spid,se.username,se.status, Se.terminal,se.program,se. Module,se.sql_address,st.event,st. P1text,si.physical_reads, Si.block_changes fromv$session Se,v$session_wait St, v$sess_io si,v$process PRWHERESt.sid=Se.sid andSt. Sid=Si.sid andSe. Paddr=pr. ADDR an

When logging in to Oracle with PL/SQL Developer: Using a filter for all users can leads to poor performance!Analysis: Regardless of the configuration of Oracle, you will see very many tables, views, sequences, etc. that are not relevant to the current work when using the tree directory on the left side of Plsql, resulting in very slow opening timesSpecific soluti

administrator directly run the script, you can get the following results: SQL Server belongs to which release, which version, which service pack, which integration fix pack, and so on. At the same time, the most important thing is that it will give you advice on which recent patch package you should install and which Servcie pack you should upgrade to. You can download and use this script from TechNet as o

Label:Original: How to identify CPU bottlenecks in SQL ServerOriginal from:http://www.mssqltips.com/sqlservertip/2316/how-to-identify-sql-server-cpu-bottlenecks/Problem:If SQL Server ou

Original: How to identify IO bottlenecks in SQL ServerOriginal from:http://www.mssqltips.com/sqlservertip/2329/how-to-identify-io-bottlenecks-in-ms-sql-server/Problem:We may often encounter a situation where SQL

Problem: We may often experience the frequent shutdown of SQL Server databases. After analyzing memory and CPU usage, we need to continue to investigate whether the source is in I/O. How do we recognize that SQL Server has I/O-related bottlenecks? Solve: When data pages are often moved out of the buffer pool, the I/

., 8.00.534).• Product level (for example, "RTM" or "SP2").• Version (for example, "Standard Edition"). For example, the results of a run might resemble the following: 8.00.534 RTM Standard EditionThe following table lists the version numbers for Sqlservr.exe:Release version Sqlservr.exeRTM 2000.80.194.0SQL Server SP1 2000.80.384.0SQL Server SP2 2000.80.534.0SQL Server