Why Is SQL Server Using So Much Virtual Memory?
Jul 23, 2005
I have two instances of SQL Server running on my Development machine.
I am having some performance problems and while investigating the
problem I saw with the Process Explorer form Sysinternals that both
instances consume each 800 Mbytes of memory!
I experimented with sp_configure and by giving both instances a fixed
memory size. Both methods do not seem to have any effect.
Can anybody explain me why SQL Server is using so much memory?
Thanks for any information.
Evert Wiesenekker
PS
Besides the northwind database I only have one simple extra database
(70 Mb in size) installed.
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Jul 23, 2005
Hi,We have a prod server running on SQL server 2000 64 bit. It is a4cpu server with 16GB of RAM. we have a maxmemory setting of 15.5GBfor sql server. Inspite of 15GB being available for sql server, itstill uses paging file space, a lot. When looking thru task maanger wecan see sql server using 15.5GB of Memory usage and 22GB of Virtualmemory usage. I don't understand why it should even be using closer to7GB of Paging space, when it has so much memory. How does SQl serveruse Virtual memeory vs Physical memory?HAs anyone seen this before.ThanksGG
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Nov 20, 1998
Local SQL 6.5 SP4 on a Windows NT SP4 workstation (Pentium 350 / 128 MB).
SQL server has 32 MB of RAM. It starts well but begins continuously eating up virtual memory by 16k blocks in a second,
until it takes all virtual memory.
Server's shutdown generate following error in Event log System section:
Event ID: 7011
Source: Service Control Manager
Description: Timeout (120000 milliseconds) waiting for transaction response
When I start Server from command prompt with -f switch, it did not eat virtual memory,
and did not generate any error in Event log at shutdown.
Many thanks for any help.
mailto:andrejss@bank.lv
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Dec 12, 2006
I have a SSIS package that is constantly running out of virtual memory, right now I am on a development server, running only this package. The package is moving data from one table into another on the same server in the same database. The server has 3 Gb of memory and is only running SS2005 and SSIS. I am a local admin on the server and running the package through BIDS, once again for our initial testing. I tried setting the property BufferTempStoragePath to our E drive so it can utilize the 100 Gb of free space we have but that doesn't seem to work either. I have also tried setting the MaxRowSize to many different values to no avail. I am constantly getting an error, see below for exact error, when it gets through roughly half the load. Moreover it reports this error about 500 times in the progress report if I let the package run to completion. Finally, when all is said and done the package has moved the data successfully but the package always shows as failing.
I have googled continuously on this problem but have not found a resolution. I did see on a post here where it was recommended to run the package out of process, however I don't see the benefit at this point when this is the only package I am running. I also don't understand why it would report the error so many times and fail the package when it is completing successfully? Source and Destination have the same number of records at the end of the task. Could someone please try to make sense of this.
Getting Error:
[DTS.Pipeline] Information: The buffer manager detected that the system was low on virtual memory, but was unable to swap out any buffers. 4 buffers were considered and 4 were locked. Either not enough memory is available to the pipeline because not enough is installed, other processes are using it, or too many buffers are locked
Any help would be greatly appreciated.
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Dec 11, 2006
I have one package that is constantly running out of virtual memory, right now I am on a development server, running only this package. The package is moving data from one table into another on the same server in the same database. The server has 3 Gb of memory and is only running SS2005 and SSIS. I am a local admin on the server and running the package through BIDS, once again for our initial testing. I tried setting the property BufferTempStoragePath to our E drive so it can utilize the 100 Gb of free space we have but that doesn't seem to work either. I have also tried setting the MaxRowSize to many different values to no avail. I am constantly getting an error, see below for exact error, when it gets through roughly half the load. Moreover it reports this error about 500 times in the progress report if I let the package run to completion. Finally, when all is said and done the package has moved the data successfully but the package always shows as failing.
I have googled continuously on this problem but have not found a resolution. I did see on a post here where it was recommended to run the package out of process, however I don't see the benefit at this point when this is the only package I am running. I also don't understand why it would report the error so many times and fail the package when it is completing successfully? Source and Destination have the same number of records at the end of the task. Could someone please try to make sense of this.
Getting Error:
[DTS.Pipeline]
Information: The buffer manager detected that the system was low on
virtual memory, but was unable to swap out any buffers. 4 buffers were
considered and 4 were locked. Either not enough memory is available to
the pipeline because not enough is installed, other processes are using
it, or too many buffers are locked
Thank you for your assistance!
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Oct 21, 2007
Hello
I design package Merge 2 tables
Table one contains almost 25 million
Table 2 contains almost 30 million
using lookup component to split record if exist start update else insert as new record every time I start execute get error on lookup component low virtual memory
Kindly if anyone have suggest I will be appreciated
Thanks in advance
Note the 2 tables have PK & IX
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Dec 4, 2007
I have a sbs 2003 sp2 server running exchange 2003 sp2 it was running fine until one day I got this low virtual memory error, I checked the memory usage in the task manager and it is using 7 gigs of virtual memory, I increased the max size from 6 gigs to 8 gigs just to see what happens and now it is using 9 gigs of virtual memory. I don't have any clue as to what the problem is! Please Help!!!
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Apr 22, 2006
I am trying to undertstand how does sql 2005 decide how to use the memory.
Does it use RAM first than the virtual memory or does it decide what to use conditionaly?
Anybody have an idea? Like if the table is really big does it put half
of the table to RAM and the other half to virtual memory ?
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Jan 19, 1999
We have a Server that is set to use 80mb of a 128mb machine. The machine is also set to use up to 300mb of Virtual memory as needed.
After running for 10 days, we got the message "Low on Virtual memory". We did some looking and found SQLServer was using 300mb between real and virtual memory.
So the question: Is there a manual method to get SQLServer to release extra memory with out stopping and restarting the service?
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Mar 14, 2006
Hello,
I am wondering if there is a way to solve a virtual memory error? We randomly get the following error when trying to run sycn over the http websync. Some clients have 512 MB running sql express, others are full instances that have 1.5 GB.
The merge process could not allocate memory for an operation; your system may be running low on virtual memory. Restart the Merge Agent.
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Jul 6, 2006
hi,
for the last six months or so my pc has been shutting down all applications for no apparent reason when a 'low virtual memory' bubble appears. I have removed dozens of items, such as games, image editos; all programmes that require a lot of memory but it is no good. Every 40mins or so the pc decides to shut everything down and where it is impossible to start any further applications, unless I log off and on or shut down the pc myself. I really am fed up with this, its so annoying. Is it because of a virus or do I still have too much on my pc?
insaneolly
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Oct 26, 2007
Hi,
Is there any setting in IS that I should have adjusted in order to avoid this message?
Information: 0x4004800C at EXTRACT from MSCRM and AX (From Source to Working Tables for Dimension), DTS.Pipeline: The buffer manager detected that the system was low on virtual memory, but was unable to swap out any buffers. 124 buffers were considered and 124 were locked. Either not enough memory is available to the pipeline because not enough is installed, other processes are using it, or too many buffers are locked
cherriesh
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Oct 18, 2007
I see following error when I execute a SSIS package as part of a job from within SQL Server
OnInformation,006-CIS-SQL,apdsvcPM2SQL,VistaMain,{F902B487-D543-4F31-AC80-EF088CD0CBA4},{74325B35-DC59-4B51-AE8E-756BCC879633},10/18/2007 6:15:12 AM,10/18/2007 6:15:12 AM,1074036748,0x,The buffer manager detected that the system was low on virtual memory, but was unable to swap out any buffers. 4 buffers were considered and 4 were locked. Either not enough memory is available to the pipeline because not enough is installed, other processes are using it, or too many buffers are locked.
SQL Server has 6 GB memory allocated to it. How can I best troubleshoot this issue?
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Jan 23, 2006
Hey,
I have a large set of data that I need to match against another large set of data. The reference table has 9.8mill rows and my input has 14.6mill rows. I started with a new project. I added my connection, then a task to clear the result table, then my data flow, then my OLE source, then my Fuzzy Lookup task, then my SQL Server Destination. I set the connection of my OLE source and set the query to pull the data. Then I set the connection of my Fuzzy Lookup task, set the reference table and told it to create a new index (the problem also occurs if I use a generated index) and then set up the matching criteria. Then I set the connection and destination for the SQL Server Destination.
After setting all this up, I hit Run. The thing ran great until ~ 800k rows and then it failed. I ran it several times and it always failed right around 800k with a message saying there was not enough space and then an error with buffers being passed to the Fuzzy Lookup component. I opened Task Manager and watched the resources as it ran and was amazed at what I saw. The Fuzzy Lookup component eats up every bit of Virtual Memory available and when it can't take any more, it errors out. I tried setting the Max Memory setting on the component and it seems to have no effect. I also played with the buffer settings on the data flow task to no avail. I even went as far as to put an identity on my input table and create a function that outputs selects that use a between on the identity to break the data into 600k chunks. I set up a ForEach component and DTS variables, but the Fuzzy Lookup component does not free the VM after the iteration of the ForEach component!
I ended up running each chunk of 600k one at a time. I have to automate this for the future, so I need a solution. Does anyone have an idea for me?
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Oct 25, 2007
[DTS.Pipeline] Information: The buffer manager detected that the system was low on virtual memory, but was unable to swap out any buffers. 12 buffers were considered and 12 were locked. Either not enough memory is available to the pipeline because not enough is installed, other processes are using it, or too many buffers are locked.
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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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Mar 24, 2008
What is a virtual server?In my new job,my boss mentioned about moving the websites from a physical server to a virtual server.Why is this done or needed?
Also he insists that I buy and install SQL server 2000 enterprise edition in my laptop and use the enterprise manager to access their server.Can't I just download the client tools from their SQL package and be able to access their server?Do I need a CAL or is it just enough to have a permission in their network for my laptop?
Can anybody throw some light here please?Thanks!
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Aug 17, 2007
I really need some help. This is what I'm trying to do: first of all, i have a PC running Vista. Now on that PC, i have a virtual machine using VMWare Workstation 6, which has Win XP with SP2 installed on it. On the virtual machine, i have Visual Studio 2005 and SQL Server 2005 Express Edition with SP2; now, the thing is, i have a program in C#, which is supposed to connect to a network, but since I'm running on just one PC which is not connected to a network, i instead connect to 127.0.0.1 via port 1433. Now here's where my problems start. At first, i could not connect because i kept receiving an error which said "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provedier: TCP provider, error: 0 - No connection could be made because the target machine actively refused it.)". A friend of my mine helped, so i did the following: i went into SQL Server Surface Area Configuration (configuration for localhost) , changed the remote connections to allow for both local and remote, using both TCP/IP and named pipes, restarted the database engine, started the SQL Server Browser; then i went to administrator tools, Data Sources (ODBC), and from System DSN tried to add an SQL Server. I gave it a name, and on the server textbox i tried typing "localhost", but doing so, i could not get past the next screen, (i did specify the port as 1433) where i have to chose between win nt and sql server authentication, and neither would work (even though i know the sa password and can log on to SQL Management Studio using that password). Then i tried copying the server name from the management studio, as the server when trying to add the system DSN. That seems to have worked, and i finished ading the SQL Server to the System DSN, using the database which i wanted. But after all these steps, i still get the exact same error as before - "An error has occurred while establishing a connection to the server.
When connecting to SQL Server 2005, this failure may be caused by the
fact that under the default settings SQL Server does not allow remote
connections. (provedier: TCP provider, error: 0 - No connection could
be made because the target machine actively refused it.)".If someone can please help - i've tried everything i can think of - i can access the internet from the virtual machine, i even tried disabling the firewall, but no luck. Is it because of the virtual machine? If so, can anyone suggest a solution? I actually doubt it, because i've even tried to install it on my pc, not the virtual machine, so on vista - and also installed SP1 for VS 2005 and SP1 for Vista, but still the same thing. Sorry for making this post so long, but if anyone can help, i'd really appreciate it. Thanks!
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Apr 19, 2001
Say I have 2 servers clustered for SQL. xxxP1 and xxxP2.
Can my SQL virtual server name be xxxP1 or does it have to be something other than the names I called the 2 W2K boxes.
Thanks..
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Jan 25, 2007
Good morning,
I am looking for some first-hand experiences from fellow DBA's where they had SQL Server running on a Win2K3 VM. What sort of issues (or successes) did you find re: resource sharing, swap files, etc? Are there any experiences where using a VM negatively affected your environment?
Thanks so much. What a great forum!
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Mar 6, 2004
I have a 2 part question about adding a new 'named' Virtual Server to an existing Clustered SQL Server 2000 install.
I have a 2 node MSCS Cluster (WIN2K advanced Server sp4) with a default SQL Server instance. This has been in production and working fine. I created a new Cluster resource and reran SQL Server 2000 ENT setup and added a second Virtual SQL Server (named instance). After many problems, finally got the second Server installed. Now I have 2 SQL Server instances in the Cluster - from what I understand, you can have up to 16, each seperate installs with seperate Cluster resources.
Thus the problem:
For the Second Instance, I have specific instructions from the Applications vendor on how to install SQL Server to work with their APP. I need install SQL Server WITHOUT the Full Text Search component and WITH a specific Server Collation (Binary order for use with the 850 Multilingual character set). (I have done this same setup on standalone SQL Server installations for this APP and they have gone smooth).
When I installed the new Virtual 'named' instance in my Cluster, I Could NOT 'DESELECT' Full Text Search when I choose Custom install.. it does not appear as an option???
Also, I chose the "Binary order for use with the 850 Multilingual character set" during the installation, but that is not the Server Collation that is installed...
I have already installed SP3 for SQL Server against the Virtual Server on this Cluster, as well as a HotFix... and Now I'm thinking I need to rerun the SQL Server installation, uninstall the second server and reinstall to see if I can fix the 'Collation problem' .. but I'm not sure if this is the right course of action.
Does anyone know why I cannot 'deselect' Full text search component at install, and any ideas why it did not install with the SQL Server Collation that I specified at install????
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Mar 12, 2008
Hi,
Can I Install a default instance on Virtual SQL Server on a 2 node Cluster. If I already have a default instance on a different Virtual SQL Server on the same clustered Server.
What i am trying to do..
if i create 2 virtual sql Server (say sqlVi1 and sqlVi2)..
i want o connect using sqlVi1 and sqlVi2..not Sqlvi1 and SQlvi2Namedinstance.
If yes..How can I do it?
Thanks in advance
I Hope someone from Microsoft or MVPs will help me.
if this is not the corrcet forum...please point me the correct one
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Sep 19, 2007
I have a clustered environment where I have virtual servers running and I have SQL 2005 on one of the virtual servers. Is there any way to have multiple SQL instances running on one virtual server, if so how? If this is not possible than what are some of my options?
Thank you,
Kern Probation
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Nov 3, 2005
I am unable to successfully complete an install of Visual Studio 2005 with SQL Server 2005 Express on a Virtual PC 2004 image, which seems to be a pretty reasonable expectation. The installation completes successfully all of the way through in a Windows XP Pro SP2 image, but at the end the installation program informs you that SQL Server Express has failed to install, with no other explanation. No setup log files give any information as to why the installation failed. Then I see in the fine print for SQL Server Express downloads that "There is no support in this release for Virtual Server, Virtual PC". (http://download.microsoft.com/download/c/c/6/cc66b572-a402-4c6a-8233-b9c7d05840c7/RequirementsSQLEXP2005.htm)
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Jun 10, 2015
We need to move a cluster to a new data center. There is a strong preference to retain the previous SQL Virtual Name. The existing cluster has a single default instance. We understand that when you have created a SQL Server FCI that you can change the SQL Virtual Name but not the instance name. So if the current SQL Virtual Name is SQL1 then at a high level:
Build cluster at new DCInstall SQL Server FCI with a virtual name as SQLTEMP and as a the default instanceShutdown old cluster ???Rename SQLTEMP to SQL1 Since there is an existing SQL Virtual Name my concern is that we cannot simply rename SQLTEMP to SQL1. Do we need to delete the VCO from AD for SQL1 in step
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Mar 14, 2011
I have been tasked with moving our SQL server estate onto new 64bit SQL 2008 Virtual servers on a VM base. Each Virtual server will be attached to our SAN that i will have no control over. Do i ask for multiple LUNs pretending that there is a COS), Etemp), FData) and Glog) disk structure or do I just present a very big space as a single C: drive and let it go.We are consolidating lots of old physical servers onto fewer (more powerful) virtual servers (according to the VM and SAN administrators)
1. Configure your SAN properly
2. Don't overallocate shared resource
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Apr 7, 2008
Sql 2005 Enterprise fails to install on a 64 bit VmWare Windows 2003 virtual server. All componets install up to including the Reporting services. The next componet (I believe it is the management studio portion) fails to install. I have moved the install files to the local machine and this did not help. If someone knows how to fix this please share.
Dave Hensley
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Jun 10, 2008
Hello All.
I have a failed sql cluster setup on Windows 2003 OS cluster. sql will not uninstall on node 1 because it says the group name was not specified in the template.ini file for the cluster. The OS cluster nodes have been evicted from the cluster. The OS cluster is no longer available to provide a group name for.
SQl uninstall process process is failing because of the error mentioned above.
I want to completely , uninstall SQL server from both nodes,
clean up Windows Server and install just a default instance of SQL server on just one of the machines, The cluster can wait.
Thanks.
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Aug 27, 2007
Hi,
I want to do the backup of SQL server. I want the backup to be consistent. So before starting the backup i want to freeze the DB and once i finish i want to thaw it.I read the Microsoft SQL server virtual backup specifications. It is concerned with taking backup of the DB using snapshot or without using snapshot.I don't want the snapshot to be created. I just want to freeze it and i will take the backup ( with or without snapshot ) . After that i want to thaw it. Is it possible using VDI or is there some other way to do that ?
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Aug 30, 2007
Hi all,
I want to write a backup application for SQL server.I have read the VDI specifications for SQL server 2005. I want to know whether I can use the VDI just to freeze and thaw without taking the snaphot and the backup. Or is there any other way to do the same ?
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Feb 10, 2008
Hi guys
We are in the processes of finalising or server architecture for our production environment and the proposal that has been put forward is to run the database within SQL Server 2005 which is running in a virtual machine. It is thought (by some) that this provides a very high degree of redundancy as it will use ESX server and will have multiple servers in the farm that it can move to in the event of a server crash (which i admit makes a degree of sense).
I however am worried about performance. I release as soon as you go to virtual you loose some raw power because the box is busy running the virtual but more from the point of view that if we make cretin hardware resources available to the virtual would the server run the same as if it was running on a physical machine of the same specifications. For example, if 4gb ram and x amount of clock cycles where dedicated to the virtual would it preform the same as running it on a physical box 4gb ram and x amount of clock cycles. If the answer is no, any supporting documentation that anyone knows of would be greatly appreciated.
As a side note if it makes any difference the database data files and transaction logs are being sorted in an external SAN and not within the virtual image itself.
Thanks
Anthony
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