What Is The Workload Limit In MS SQL Server?
Jun 13, 2006
Hi, I need some help about a project I'm working on.
I'm working on a project (based on MS SQL Server) that will involve a lot of clients, each one constantly querying the server.
Just to have an idea of the project, I'm talking of about 2000 clients, each one queries the database 3-4 times per second: a total of 6-8000 queries per second.
The database is reached through Internet and every client uses a dedicated DSL connection.
My questions are:
- What is the maximum workload of a Microsoft SQL Server?
- What happens when the server workload reaches 100%? is there a queue? and what happens when the queue is full? is it possible that the server goes out of service due the excess of work?
- What are (more or less) the hardware requirements for such a server?
can anyone help me, at least telling me how to find these answers (web sites, books, ...)
thank you for you support
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Aug 27, 2014
We are using Sql Server 2008 R2. We are planning to move to 2014 either through in-place o side-by-side. Mostly side-by-side.
Here first we want to test that 2014 and availability groups. First we are doing in dev box to test. Also we need asynchronous replica because just we need to use that as reporting server.
We want to take work load. For the dev boxes, the applications doesn't connect. Then in that case what the people will do.
If We take database backup from prod to that dev and run some queries in the loop and run the trace for some time and do either in-place migration or side-by-side migration and use the same back to restore and doing the running the same queries and compare this trace to previous trace will work?
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Mar 19, 2015
I am trying to create a table that would represent a workload for each shop. In order to do that I need to have WorkLoad table and ShopWorkLoad table which is actually just aggregation of WorkLoad.
WorkLoad contains a list of following items:
current orders that are in the process (one select statement)
scheduled orders (another select statement)
expected orders (third select statement) that come through a third-party system
All of this needs to be live. So, for example, as soon as order is added to Order table it should be included in WorkLoad if certain conditions are met. Same goes for scheduled orders (which come from another table). Expected orders will be loaded on a daily bases (based on historical data).
ShopWorkLoad table is aggregation of WorkLoad table.
Currently I did it this way:
Added after insert/update trigger on Order table: when order is created/updated, if it meets certain conditions, it should be inserted in WorkLoad, otherwise remove it from workload if it's in there and doesn't meet conditions
Added after insert/update trigger on Schedule table: when order is scheduled, if it meets certain conditions, it should be inserted in WorkLoad, otherwise remove it from workload if it's in there and doesn't meet conditions
Running daily job that populates WorkLoad table with expected orders based on historical values
Final step is to create an indexed view vShopWorkLoad
My biggest concern is usage of triggers which call pretty complex logic to determine whether item should be added to workload or not.
One other option was to create vWorkLoad view and somehow make it an indexed view but currently I don't see a way of doing that because the query consists of 4 union select statements, below is pseudo example. But even if doing it that way, how to build aggregated indexed view on top of vWorkLoad indexed view?
Third option is to use sql agent job which would run every x seconds (maybe 20) and it would execute all of these queries to populate WorkLoad table with delay of 10-20 seconds, but I am still not sure if this is acceptable to the client.
Fourth option is to create 3 or 4 indexed view where sum of them makes a workload. Then, ShopWorkLoad view would be built on top of these 3 or 4 indexed views, but in this case I don't know how this would affect performance since ShopWorkLoad query would be often queried.
Example of workload pseudo query:
select
WorkLoadType = 'Order in process',
OrderId,
ShopId,
...
from
Order
[Code] ....
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Apr 14, 2008
Suppose I create a DTS package (I am an old timer from SQL Server 2000 days but I suppose with 2005/2008 integration services there is a similar concept of package) which essentially reads data from a set of csv files, transforms it, and loads it into a SQL Server database. There are two scenarios:
i) The transformation involves applying functions on the columns before loading to the database.
ii) The transformation involves joins of data from multiple files.
My question is, can I run this DTS package on a machine which does NOT have SQL server installed for scenario i) and scenario ii) above? The idea is to distribute the actual processing across a set of computers to take off load from the main database server. If it can be done for either case then can u please explain how? Thanks in advance for your help.
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Dec 16, 2004
Hi - does the workload governor kick in when more than 8 concurrent operations take place on MSDE as a whole, or does it kick on each database.
Ie. if I have 8 databases within MSDE - and there is 1 operation happening on each one at any given time, will one additional operation on any of the databases invoke the workload governor across ALL databases?
Thanks,
Mark
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Jul 23, 2005
Hello,- Is any body aware of a random workload/query generator such as theTPC-H query generator (QGEN) ? I am looking for a query generator thattakes a schema as an input, and produces several queries.I need it mainly for performance evaluation. the generator I am lookingfor should produce SELECT queries, including joins, and not only INSERTINTO, DELETE, UPDATE queries such as the "SqlQueryGenerator" athttp://www.tucows.com/preview/297930ThanksRegards,Abdur-Rahman
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Jan 8, 2007
Hello,
I am in the process of porting over an application from Access To SQL implementing SQL Server 2005 Express. My intention is to implement this database on a full time server and upgrade to a full blown version of SQL later. Am I correct in assuming that there is not limit on the number of concurrent connections to SQL Server Express since it was stated that the "Workload Governor" has been removed? Or does something else control the number of users that can be simultaneously connected to the server.
My reason for asking is I have 7 machines that need to access the server. I also have 2 databases that need to be accessed from each machine. If there is no limit, I will keep my databases seperate. However, if there is a limit, I will most likely merge the tables into 1 db.
Thank you,
Robert
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Nov 6, 2007
I have a specific job that should be run with a decreased memory usage when the workload is heavy on the SQL Server.
This is a heavy job that has no specific requirement when it comes to response time.
It is important that the rest of the application shouldn’t be affected with longer response time when this job is running.
How can this job bee handled from the application, without having to create a separate batch job.
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Aug 3, 2004
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i want to replace the 10 in the inner select with a variable. When I do this:
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Jul 20, 2005
I'm storing time series data in a table in SQL server 2000. The tablehas columns like: CodeEquity, PriceDate, LastPrice. To extract thelast price for a number of equities on COMMON DATES I have used thequery:select t.LastPrice,h1.LastPrice,h2.LastPrice,h3.LastPrice fromBlg_HistoricData t,Blg_HistoricData h1,Blg_HistoricDatah2,Blg_HistoricData h3where t.CodeEquity=114151 and h1.CodeEquity=112220 andt.PriceDate=h1.PriceDate and h2.CodeEquity=112580 andt.PriceDate=h2.PriceDate and h3.CodeEquity=112228 andt.PriceDate=h3.PriceDatethis works for about 20 self joined tables and then says syntax error.I'm wondering what sql limits it hits. Is it possible to do this inSQL for 300 tables?Thank you.
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Jul 20, 2004
I have used this mysql code in my programm before:
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It works fine. But now I want to use sql server, and it doesn't recognize the term limit.
So I have found out that I can use top instead.
I have changed my code into this:
select top 0 * from (select top 10* from address order by vorname) order by vorname asc
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Can anyone give me a solution?
Thank you.
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Sep 23, 2005
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Or would a more heavy duty DB be in order for these sorts of data rates?
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Oct 27, 2005
How can I check (from TSQL) if a table is likely to bust the 8k limit?ThanksMike
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Jan 29, 2004
Hi groupmates,
In MySQL, we can use limit for our selection. E.g.
select * from mytable limit 10, 20
means selecting [20] records of all information from the table [mytable] from the [10]th record
But in MS SQL, what can we do? Please help.
I am writing PHP to retrieve small data from a large volume of database. Please help
-stan
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Jul 23, 2005
SQL Server 2000 SP3 on a Dell dual 2.4GHz Xeon box 3GB RAM Windows 2KSP4. Two aplication dbs, each less than 2GB in size.Had a problem where we would run Solomon queries and what not againstthe box. It had 2GB RAM, and sqlserv.exe would take up to 1.85GB ofRAM, exhausting the physical RAM on the box. SQL would choke and theSolomon users would have problems, and I would have to restart the SQLservice.I added another GB of RAM, bringing the box to 3GB, and increased thepaging file. The OS sees it, and SQL sees it. I check EnterpriseManager, and tell SQL to dynamically configure memory, and it offers anupper limit of 3071MB, so it "sees" the 3GB.I can stress the box with queries to the point that sqlserv.exe takes1.99GB of memory (as viewed through Task Manager) and then SQL serverchokes. It never goes past 2GB, and the OS and box continue runningfine.Does SQL server 2000 have some upper limit, or do I just need to changesome setting through EM?Thanks.
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Jul 20, 2005
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Aug 1, 2007
hey all,
i want to know Equivalent of "LIMIT" of MySQL in SQL Server 2005?
in mysql we can direclty get data using LIMIT clause.
my question is how to do this in sql server 2005?
thanks.
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Jun 5, 2004
What is the SQL Server equivalent of the LIMIT keyword available in MySQL?
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this SQL does not work? I get an error saying that there is an error at keyword LIMIT. When I remove LIMIT 1, it works...
is there anything like this in SQL Server?
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Apr 19, 2001
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thanks,
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Feb 8, 2006
Hi there, it seems the search feature refuses to work so i am posting a question which I am sure has been answered :)
What is the best way to get the LIMIT command functionality in SQL SERVER?
I am making an ASP.NET page, and am unsure how to go about tabbing through 100s of results.
Many thanks,
Taz
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Dec 29, 2003
Hi all.
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Talking to a friend, he tells me this is not true, and that it has a database size limit of 12gb.
Is Microsofts site incorrect, or is my friend lost?
Cheers! :-)
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