in my previous workplace we used oracle enterprise manager for viewing statistics and bottlenecks of queries that are running against oracle10g. In my new workplace we use Microsoft SQL Server (2005). Is there any tool like enterprise manager of oracle in SQL Server - I need to see all the jdbc SQL queries i make and how long they are taking in the db..
thanks
Use SQL Server Profiler for tracing DB queries and such.
If you are looking for costs of queries and how they break down, you should use the Query Analyzer that is built into SSMS.
For SQL 2005 SP2 and later, you can download the Performance Dashboard Reports from MS (free).
Quote:
Common performance problems that the
dashboard reports may help to resolve
include:
- CPU bottlenecks (and what queries are consuming the most CPU)
- IO bottlenecks (and what queries are performing the most IO).
- Index recommendations generated by the query optimizer (missing indexes)
- Blocking
- Latch contention
The information shown in the reports is from the dynamic management views which you could query yourself if you didn't want to download this addon.
A combination of 'SQL Server Profiler', 'SQL Server Management Studio' and 'Database Engine Tuning Advisor' will be your friend. Have a look at showing the estimated and actual execution plans using SSMS, or create trace files with SQL Server Profiler (using the Tuning template) to feed to the Database Engine Tuning Advisor
I'm using Qure Analyser (free) which I've found very useful. It works by analysing a SQL Server trace file (.trc) and showing you which queries take up most CPU time, cause the most IO, or are called most often. Useful for spotting problems in the application code which may cause it to abuse the database.
Related
I'm studying of Azure Synapse.
In dedicated SQL pool database, 'actual execution plan' of SSMS was disabled.
In serverless pool database, SSMS says 'set statistics is not supported.' in SQL execution.
I forgot of take screenshot. Image of 'disable of actual execution plan' is '4. Run the query by selecting Execute or use the following shortcut: F5.' of this page.
I understood SSMS could only shows plan of SQL, and not shows actual plan and live statistics.
But I still mysterious thing is how Synapse experts make faster SQL in Synapse?
In synapse, they don't use complex SQL(ex. much of outer join SQL)?
If my question is completely misunderstood of Azure Synapse system, please point out me.
Later versions of SQL Server Management Studio (SSMS), v18.x plus do support estimated execution plans for Azure Synapse Analytics dedicated SQL pools so the first thing you should do is check your version and update to the latest one. Here is an example plan from SSMS against a dedicated SQL pool, you can see it's got a Round Robin operator:
In terms of performance, you should generally look to hash partition your large fact tables on a key that gives good distribution and replicate your small dimensions. Use round robin distribution as a starting point or where you find it's appropriate for performance with your workloads. Use EXPLAIN to view text-based estimated execution plans. Visual Actual Execution Plans are not supported for but you can review the performance DMVs like sys.dm_pdw_request_steps:
SELECT *
FROM sys.dm_pdw_request_steps
WHERE request_id = 'QID####'
ORDER BY step_index;
Further details on this listed here.
I need to measure the SQL Azure DB performance using DTA, is it possible or not, if not what is the workaround to consume a workload file (.trc)??
Database Engine Tuning Advisor does not support Azure SQL Database. It is also not possible to create a trace file from an Azure SQL Database using SQL Server Profiler.
SQL Azure automates the creation of indexes that may improve performance of your workload with a feature named automatic tuning. Automatic Tuning on Azure SQL also drops redundant indexes and uses the best execution plan for queries
Alberto is correct - there are features within SQL Azure which help watch and improve the performance of your database queries automatically in some cases. Profiler trace + DTA are not currently supported in SQL Azure. The DTA (Database Tuning Advisor) feature in SQL Server is very good for taking traces and trying to replay them on a different server to simulate possible index and partitioning changes which could improve your performance. The automatic tuning feature does that for you without having to use DTA today yourself.
https://learn.microsoft.com/en-us/azure/sql-database/sql-database-automatic-tuning
If all you want to do is explore the performance of your database, then you can use the query store in SQL Azure (and SQL Server 2016+) to do this kind of analysis.
https://azure.microsoft.com/en-us/blog/query-store-a-flight-data-recorder-for-your-database/
https://learn.microsoft.com/en-us/sql/relational-databases/performance/monitoring-performance-by-using-the-query-store?view=sql-server-2017
If you have not tried this using a recent release of SQL Server Management Studio(SSMS), then I highly suggest you download this and try it. You can see top N queries by different metrics, plan changes over time, and other metrics which give you faster insight into the performance profile of your database + application.
There is no way to take a .trc file today and examine it in the query store, but you can enable query store in an on-premises SQL Server (2016+) and then record your production workload for awhile to see how it is behaving. Please understand there is an overhead to running with the query store on - usually it is modest, but for highly ad hoc OLTP query workloads you may see larger overhead. There are some knobs to tune this, so please just go through normal due diligence before modifying a production system. If you have problems, turn it back off and re-examine until you have the right settings to help capture the relevant data from your workload to help make tuning decisions.
Hope that helps!
Sincerely,
Conor Cunningham
Architect, SQL
I want to run sql profiler to see the performance of my database Sql Server 2008, but I'm afraid that running the profiler in the same machine it will affect the performance of the server, and I don't want to slow down ther server.
A long time ago I heard from a DBA than he run the profiler from his laptop connected to the sql server, in a way that it does not affect the performance of the server.
Si bassically my question is How to run Sql profiler from an external computer without causing slow performance of the sql server?
Any database being profiled has to do work in order for profiling to be possible - there is no way around it. Generally speaking, observation of a system always induces a load to that system. However, SQL Server Profiler and other similar tools also do ADDITIONAL work outside of the target db, and this additional work can be offloaded to another computer.
To offload what you can, you just run SQL Server Profile from ANY machine that is not the database server. When you start a New Trace, you tell it to connect to the database on whatever server the database is running on. That's all there is to it. Your target db will incur some additional load (unavoidable), but you will be offloading as much work as you can to whatever machine you run Profiler on.
If you are able to connect to the computer from external computer,then there would be no issues running profiler remotely as well..
So basically my question is How to run Sql profiler from an external computer without causing slow performance of the sql server?
When you run profiler for long periods of time ,it affects performance,since it has to keep track of all events in memory and log it before discarding ..So running profiler for long periods of time is not recommended..
You also can use extended events starting from SQL2008(very light weight relative to profiler) to track events similar to Profiler ..
http://www.sqlteam.com/article/introduction-to-sql-server-2008-extended-events
Profiler can be initiated from any computer with appropriate permissions and access, but it ALWAYS runs on the actual SQL Server instance. There is no way around this. You can minimize the operations that are logged and filter by a specific user to mitigate performance issues, but that's about it.
The DBA in question may have run a server side trace, which can be less impactful, but it's still inititated ON the appicable instance.
I am a DBA and I am not aware of any performance issues by running SQL Server Profiler on the server itself. That said when you run SQL Server Profiler It loads just like SSMS where you can select which server to use.
If you have a query that is running so long that its killing SQL resources yes running it at all will still use up resources but regardless of where the source of the profiler is.
See screenshot of SS Profiler
If you are concerned about performance on the SQL Server instance don't run Profiler in production during peak hours.
If you want to minimize the impact of SQL Trace then it is the best to use the server-side tracing:
https://msdn.microsoft.com/en-us/library/cc293613.aspx
Like that you can record the SQL commands into a trace file and SQL Profiler is closed. When you are done with the SQL command collection, you can copy the trace file and open it using SQL Profiler in some other computer. It is much better than runing SQL Trace directly through SQL Profiler (which is called the client-side tracing).
I just realized that my application was needlessly making 50+ database calls per user request due to some hidden coding -- hidden in the sense that between LINQ, persistence frameworks and events it just so turned out that a huge number of calls were being made without me being aware.
Is there a recommended way to analyze individual transactions going to my SQL 2008 database, preferably with some integration to my Visual Studio 2010 environment? I want to be able to 'spy' on individual transactions being made, but only for certain pieces of my code, and without making serious changes to either the code or database.
I addition to SQL Server Profiler, there are a number of performance counters you can look at to see both a real time evaluation and a historic trend:
Batch Requests/sec: Effectively measures the number of actual calls made to the SQL Server
Transactions/sec: Number of transactions in each database.
Connection resets/sec: number of new connections started from the connection pool by your site.
There are many more performance counters you can monitor, specially if you want to measure performance, but going through is besides the scope here. A good starting point is Monitoring Resource Usage.
You can use the SQL Profiler tool that comes with SQL Server Management Studio.
Microsoft SQL Server Profiler is a graphical user interface to SQL Trace for monitoring an instance of the Database Engine or Analysis Services. You can capture and save data about each event to a file or table to analyze later. For example, you can monitor a production environment to see which stored procedures are affecting performance by executing too slowly.
As mentioned, SQL Profiler is userful at the SQL Server level. It is not available in SQL Server SSMS Express however.
At the .NET level, LINQ to SQL and the Entity Framework both support logging. See Logging every data change with Entity Framework, http://msdn.microsoft.com/en-us/magazine/gg490349.aspx, http://peterkellner.net/2008/12/04/linq-debug-output-vs2008/.
I am trying to optimize some stored procedures on a SQL Server 2000 database and when I try to use SQL Profiler I get an error message "In order to run a trace against SQL Server you have to be a member of sysadmin fixed server role.". It seems that only members of the sysadmin role can run traces on the server (something that was fixed in SQL Server 2005) and there is no way in hell that I will be granted that server role (company policies)
What I'm doing now is inserting the current time minus the time the procedure started at various stages of the code but I find this very tedious
I was also thinking of replicating the database to a local installation of SQL Server but the stored procedure is using data from many different databases that i will spend a lot of time copying data locally
So I was wondering if there is some other way of profiling SQL code? (Third party tools, different practices, something else )
Your hands are kind of tied without profiler.
You can, however, start with tuning your existing queries using Query Analyzer or
any query tool and examining the execution plans. With QA, you can use
the Show Execution Plan option. From other tools you can use the
SET STATISTICS PROFILE ON / OFF
In query analyser:
SET STATISTICS TIME ON
SET STATISTICS IO ON
Run query and look in the messages tab.
It occurs to me this may require same privileges, but worth a try.
There is a workaround on SQL 2000 to obfuscate the Profiler connection dialogue box to limit the sysadmin connection to running traces only.
SQLTeam
Blog