How Is Sql-server Using The Memory?
Oct 29, 2007
I often read about that the best is that the whole database could fit in RAM.
Lets say I have a dabase that is 1000gb. I have 20gb RAM.
Its quite obvious that it wont fit in the memory, but is this always the case?
Say for example that in the database there is one table that is 990gb, and another table that is 10gb.
Nothing is written or read to the 990gb table, all the activity is in the 10gb table.
If I delete the 990gb table from the database, will sql-server need to perform less IO then, or doesnt it matter if I delete it?
Another scenario could be that we have two databases in the system. One 990gb and one 10gb, the system still has 20gb RAM. There is no activity in the 990gb database, but there is alot of activity in the 10gb database.
If I delete the 990gb database, will sql-server perform better, or doesnt it matter?
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Aug 2, 2006
Hi
I did a load testing and found the following observations:
1. The Memory:Pages/sec was crossing the limit beyond 20.
2. The Target Server Memory was always greater than Total Server Memory
Seeing the above data it seems to be memory pressure. But I found that AvailableMemory was always above 200 MB. Also Buffer Cache HitRatio was close to 99.99. What could be the reason for the above behavior?
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Aug 22, 2007
sql server 2000 is running on windows server 2003 ... 4gb of memory on server .... 2003 was allocated 2.3gb nd sql server was allocated (and using all of it) 1.6gb for total of approx 4gb based on idera monitor software ... all memory allocated betweeen the OS and sql server .... then 4 more gb of memory added for total now of 8g ... now idera monitor shows 1.7gb for OS and 1.0 gb for sql server ..... 'system' info shows 8gb memory with PAE ... so I assume that the full 8gb can now be addressed .... why are less resources being used now with more total memory .... especially sql server ..... i thought about specifying a minimum memmry for sql server but i amnot convinced that would even work since it seems that this 1gb limit is artificial .... it it used 1.6 gb before why would it not use at least that much now ??
thank you
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Jul 13, 2015
I am looking to test this feature - and the "Transaction Performance Collector" has recommended me a table to port to In-Memory OLTP.Â
I have now tried the "Table Memory Optimization Advisor" tool.
After a couple of tweaks to the table design - the tool is now passing validation but the tool is not allowing to progress to the next step:
Could it be down to not having enough memory? But would this not show in the advisor?
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Sep 28, 2007
Hello. I have received the follwoing error upon an attempt to Browse the Cube. All other tabs are functional, including the Calculations tab. We are running Windows Server 2003 SP2 and SQL Server 2005 SP2. Any suggestions would be greatly appreciated!
**EDIT** - Have confirmed SP1 for VS2005 is installed both locally and on server, also.
Attempted to read or write protected memory. This is often an indication that other memory is corrupt. (Microsoft Visual Studio)
------------------------------
Program Location:
at Microsoft.Office.Interop.Owc11.PivotView.get_FieldSets()
at Microsoft.AnalysisServices.Controls.PivotTableFontAdjustor.TransformFonts(Font font)
at Microsoft.AnalysisServices.Browse.CubeBrowser.UpdatePivotTable(Boolean translate)
at Microsoft.AnalysisServices.Browse.CubeBrowser.UpdateAll(Boolean translate)
at Microsoft.AnalysisServices.Browse.CubeBrowser.InitialUpdate()
at Microsoft.AnalysisServices.Browse.CubeBrowser.SupportFunctionWhichCanFail(FunctionWhichCanFail function)
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Oct 11, 2007
I've been researching AWE to determine if we should enable this for our environment.
Currently we have a quad core box with 4 gb of RAM (VMware). OS: Windows 2003 std, SQL Server 2005 std. 3GB is not set but will be as soon as we can perform maintenance on the server.
I have read mixed feedback on AWE, either it works great or grinds you to a hault. I would assume that the grinding to a hault is due to not setting the min/max values correctly or not enabling the lock page in memory setting.
We only have one instance of SQL on the server and this box won't be used for anything else aside from hosting SQL services. We do plan on running SSRS off of this server as well.
1. Will running SSRS and enabling AWE cause me problems? Will I have to reduce the max setting by the SSRS memory usage or will it share and play nice?
2. How do I go about setting the Max value? Should it be less than the physical RAM in the box? Right now its set to the default of 214748364, even if I don't enable AWE should this default value be changed?
3. It seems that even at idle the SQL server holds a lot of memory and the page file grows. If I restart the process in the morning, memory usage in taskmon is at 600mb or so. By the end of the day, its up around 2gb. How can I track down whats causing this, should this even concern me?
4. The lock Page in memory setting worries me. Everything I've read on this seems to give a warning about serious OS and other program support degradation. In some cases to the point where they have to restore the settings on the server before they can bring it back up. What are your thoughts on this.
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Aug 28, 2015
I have a Windows sever 2012 with sql server 2012 enterprise. Ram size is 22GB. Sometimes SQL sever takes 95% memory.My question, How to reduce memory size without killing any process because it's production server.So there are many background process is running. And,Is there any guides to learn why Memory is raise d so high and how to reduce it.
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Mar 27, 2008
Hello, I understand that we should use SSMS -> Server Properties -> Memory to put a cap on the SQL server memory usage, therefore it gives some space memory for OS, this is based on the fact if the max memory is not specified, SQL will use whatever available memory and eventually crash the system.
My question is that when a server has SSIS and SSAS services installed along with the SQL service. Would the max memory setting covers the SSIS and SSAS memory usage, or the SSIS and SSAS has to shared the memory with OS?
Thanks,
fshguo.
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Dec 6, 2006
I am running Visual Studio 2005. I have an SSIS Package which is consuming a huge amount of memory. During the execution of the package the memory keeps increasing. Until finally i get an Out of Memory exception. I have run this package using dtexec, and in the BIDS. No difference. I do have some script components and have added some code to get the assemblies in the current appdomain. I do see that one particular assembly is increasing on every loop. VBAssembly every time it hits the script component is increasing by 6, and along with it the memory is climbing. What is this VBAssembly being used for is there an update to SQL Server Integration Services that I need?
Thanks! Aaron B.
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Oct 4, 2015
i want to create a lot of index for my database for performance.but i need find memory usage by indexes.
How to find memory usage by index in sql server?
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Jun 15, 2015
I've a database with a memory optimized filegroup on it. How can I remove it?I have removed the memory optimized table I had on it, but when I try to remove the filegroup I receive an error.
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Apr 20, 2007
My server is a dual AMD x64 2.19 GHz with 8 GB RAM running under Windows Server 2003 Enterprise Edition with service pack 1 installed. We have SQL 2000 32-bit Enterprise installed in the default instance. AWE is enabled using Dynamically configured SQL Server memory with 6215 MB minimum memory and 6656 maximum memory settings.
I have now installed, side-by-side, SQL Server 2005 Enterprise Edition in a separate named instance. Everything is running fine but I believe SQL Server2005 could run faster and need to ensure I am giving it plenty of resources. I realize AWE is not needed with SQL Server 2005 and I have seen suggestions to grant the SQL Server account the 'lock pages in memory' rights. This box only runs the SQL 2000 and SQL 2005 server databases and I would like to ensure, if possible, that each is splitting the available memory equally, at least until we can retire SQL Server 2000 next year. Any suggestions?
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Jul 17, 2006
Hi,
I am going to install SQL Server 2000 (then SQL 2K5) on a Win Server 2K3 with 8 GB of ram, but it will be 16 GB in the near future.
I would like to reserve a fixed memory (for momemt less than 3-4 GB) for SQL Server and the rest for application (virtualization).
Without AWE enabled, max memory for SQL Server 2K5 is 4GB as for SQL Server 2000?
How can I manage and optimize memory keeping in mind AWE. (any doc, website available?)
Thank
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Nov 8, 2015
I am receiving the following error when starting a program called ShelbySystems that is supposed to connect to a local database. I don't think this is a security issue but I don't know much about SQL server either so...
  DIAG [08001] [Microsoft][ODBC SQL Server Driver][Shared Memory]SQL Server does not exist or access denied. (17)
  DIAG [01000] [Microsoft][ODBC SQL Server Driver][Shared Memory]ConnectionOpen (Connect()). (2)
System Info:
Windows 10Â Home -Â upgrade from 8 64 bit
SQL server 2012 Express
SQL Backwards compatibility 2005 64 bit
ShelbySystems software v5.4
I am including the trace log in case it is useful.
DBInstall 130c-728ENTER SQLAllocHandle
SQLSMALLINT 1 <SQL_HANDLE_ENV>
SQLHANDLE 0x00000000
SQLHANDLE * 0x02EC58F4
[code]....
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Feb 10, 2015
So I started a new job recently and have noticed a few strange configurations. Typically I would never mess with min memory per query option and index create memory option configuration because i just haven't seen any need to. My typical thought is that if it isn't broke... They have been modified on every single server in my environment.
From Books Online:
• This option is an advanced option and should be changed only by an experienced database administrator or certified SQL Server technician.
• The index create memory option is self-configuring and usually works without requiring adjustment. However, if you experience difficulties creating indexes, consider increasing the value of this option from its run value.
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Mar 20, 2008
Hello frnds Can Anybody explai what does it mean by question itself and how to resole it ?
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Nov 14, 2007
Dear All,
I have hosted ASP.Net site with Sql server 2005
I have also configured State server for my site and started ASPNET State Server
I have gone one problem hat is SQL serve memory varies form 800MB to 1GB
I have been closing all the db objects in my code also installed SQL serve SP 2 still the problem exist
Can any one help
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Mar 24, 2004
Hi all,
I am using StringBuilder to build a huge insert string which clubs around 12,000 insert strings into a single string. But whle executing this string the SQL server does no insert and the profiler shows that SQL server was out of memory. Any ideas?
Is there a limit to the maximum number of inserts I can do?
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May 2, 2002
We have an issue where every month or so one of our servers that we upgraded from SQL 7 to SQL 2000 says that its memory is low. We get this error through our SQLProbe application. If we reboot it will go away. Any suggestions?
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Aug 9, 2001
Question:
Exchange & SQL 7.0 are running on the same server. You notice the performance in exchange is degraded. The min server memory,Maximum server memory & set working area are set as they were automatically in the installation. What you do to free memory for exchange.
Answer: Increase Min server memory.
why ?
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Feb 22, 1999
I just got a new server I need to install SQL Server 6.5 on and am
wondering if someone could give me a little advice as to how much memory
to configure for it. It will be dedicated to SQL Server. It has 1GB of
memory presently with 2- 450Mhz Xion processors. I don't know if you
need any other information to make this decision or not. All the SQL
Server memory charts I see only go up to 512MB of memory.
Does anyone have any suggestions for me? I do realize that this will
have to be fine-tuned depending on the specifics of our server, but any
range to start with will be beneficial.
Thanks!!
Toni E.
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Jul 25, 2000
I have two NT 4.0 Boxes with SQL 6.5 on both. Server A transfers data to Server B once a week. Server B is connected to the net via a cable modem. Sometime during the day Server B has its CPU become 100% utilized. SQL Server memory goes from roughly 7 meg to 31 meg. When I do an sp_who at this time, it appears there are 4 spids running that shouldn’t in the master db. Somehow, Sever B also connects to Server A and connects some spids that do not appear to do anything. I am stumped on how to narrow down what is causing this behavior. It should also be noted, that currently no one is connecting to Server B. There are no scheduled tasks to be run on either machine.
Thanks
E
ekaufman@kpmg.com
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May 4, 2006
Hi All,
Sql Server 7
In sql server Logs i see the Message.
Insufficient memory available..
Error: 17803, Severity: 17, State: 17
Please suggest How to Solve this.
Thanks in Advance
Adil
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Jun 23, 2007
Hello,
I have 2 processor server with 4GB memory. It is dedicated SQL server. Currently I have Windows 2003 standard edition and SQL 2005 standard edition. It used only about 1,7 GB for the SQL server and 300 MB for other application, task manager showed 2,0 GB of use.
Then I added /3GB switch to boot.ini. After that, system shows use of about 3GB, but SQL stayed on 1,7 GB max (even I set more in properties), the only advantages was, that I could use another 1,3 GB for other applications.
But I would like to give more memory to SQL server. I searched web, but I am still not sure about if it is
-possible on current software or if not,
-what is the cheapest way how to do that (upgrade to Windows Enterprise is of course much cheaper than to SQL 2005 Enterprise, will AWE memory help me?)
P.S. I can use only 32-bit software.
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Mar 4, 2008
sql server seems to be using a huge amount of ram & virtual memory - how can I get to the bottom to what is causing this?
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Jul 23, 2005
I have a SQL Server 2000 (EE) machine dedicated to running only SQLServer that is not using all of the memoery on the machine. I have readand tried setting all of the memory setting available in the BOL withno luck. The database is about 10 Gb in Size. I have four 2.7 Xeon MP's16Gb of ram. The SQL server is only grabbing about 2 Gb of Memory.Since I am running Enterprise Edition I am not sure why It will notload more of the db into memory. I have run all of the profiles and theresults would indicate that it wants more memory but the box shouldhave plenty. Any suggestions would be greatly appreciated.Thanks in Advance,rhorner
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Jul 23, 2005
I have a performance and memory management issues with SQL SERVER. Ifeel SQL server does not releases the unused memory back to the OS. Ihave been monitoring that at the end of the day the SQL SERVERperformance gets really bad. And it this point it has acquired all theCache it could. I have abt 4 GB of RAM on my server and out of it SQLSERVER uses almost 2.7 GB whether there is load on the machine or not.If there any way or tool to monitor this. Also is there any way to Freememory from SQL server back to OS.
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Sep 9, 2015
From everything I read setting the max server memory to a reasonable capped limit is a best practice to support effective performance and reliability of your SQL Server. However, I have seen a few discussions saying that althrough SQL will use lots of memory, it can easily release it to the OS if the OS requires it for OS operations. If that is genuinely the case, why do you need to cap the amount of memory SQL can use, if when the OS needs memory resources SQL will release them?
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Nov 19, 2007
In my production environment, I am having one Quad processor with 260GB of HDD, with Database Size 21GB and 3GB of RAM.
After tuning all server-level objects (indexing and statistics, procedure tuning etc.) , server is still responding bit slow. It has been found that RAM (Server Memory) could be the blockage for the same.
Can anyone help me to identify the proper size of RAM for the same configuration.
I seems it should be around 8GB atleast.
Thanks in advance.
Regards,
Nikunj Naik
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Apr 24, 2014
SQL Server In Memory OLTP 2014?
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Oct 9, 2015
I have the following SQL FCI configuration:
NODE1 -256GB
INST1 - 64GB min/64GB max
INST2 - 64GB min/64GB max
NODE2 - 256GB
INST3- 64GB min/64GB max
INST4- 64GB min/64GB max
With this configuration and if all instances are running on the same node there will be enough memory for them to run. Knowing that normally i ll have only 2 instances in each node wouldnt it be better the following config?
NODE1 -256GB
INST1 - 64GB min/128GB max
INST2 - 64GB min/128GB max
NODE2 - 256GB
INST3- 64GB min/128GB max
INST4- 64GB min/128GB max
With this configuration and in case all the instances (due to a failure) start running on only 1 node, SQL will adjust all instances to just use Min memory specified?
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May 17, 2008
Is there any way to recycle SQL Server memory, other than restarting the service? Should we restart the service on schedule? The memoy goes high and once high it stays there. SQL Server is not releasing it...
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Nov 24, 2001
I am running a 9GB SQL Server Database on Compaq ML 530 Prolent with 3 GB of board memory. Max Server Size has been specified as 2.7 Gb, but SQL server is only able to use 1.72 Gb and beyond that even after putting more load the memory usage does not increase, infact the performance starts to degrade.
Any Clues.
Service Pack has been installed.
Thanks in Advance
Manish Wadhwa
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