SQL Server Max Memory Settings

Hi,
I'd like to check if SQL Server will consume memory more than the configured MAX Memory settings? And if so when does SQL consume that and how much would it consume.
Regards,
Jay

Hi,
I'd like to check if SQL Server will consume memory more than the configured MAX Memory settings? And if so when does SQL consume that and how much would it consume.
Hi
Can you please tell us what is version and edition of SQL Server here. If it is 2012 its little difficult to reporduce your scenario where SQL Server 2012 will take more than max server memory setting because lots of features which use to take memory
outside buffer pool before SQL 2012 are now changed to take memory from buffer pool. Also quite lot depends on whether system is 32 bit or 64 bit
For SQL Server versions below 2012(not SS2000) you might get lucky with following (taken from
Here)
1. COM Objects
2. SQL Server CLR
3. Memory allocated by Linked Server OLEDB Providers and third party DLL’s loaded in SQL Server process
4. Extended Stored Procedures:
5. Network Packets
6. Memory consumed by memory managers. If the memory request is greater than 8 KB and needs contiguous allocation.
7. Backup
If you heavily use above features you might see SQL Server memory utilization crossing above max server memory setting. Of all above SQLCLR and extended stored procs would be my bet. If you use them heavily you might see what you want to. Extended
stored proc has performance issues so use it on your own risk. Use below query to check SQL server memory utilization( works from SS 2008 and above)
select
(physical_memory_in_use_kb/1024)Memory_usedby_Sqlserver_MB,
(locked_page_allocations_kb/1024 )Locked_pages_used_Sqlserver_MB,
(total_virtual_address_space_kb/1024 )Total_VAS_in_MB,
process_physical_memory_low,
process_virtual_memory_low
from sys. dm_os_process_memory
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it.
My TechNet Wiki Articles

Similar Messages

SQL Server 2005 Memory Explosions

We have the following configuration:
ESXi 5.1.0 running on three clustered Dell 710 servers
vCenter Server 5.1.0
The clustered servers have a total of 88G of RAM
SQL Server 2005 x86 running on a virtual Server 2008 R2 x64. All databases run fine for several days with memory usage seeming at ~25%. Suddenly, the memory consumption
shoots up to ~98% and we have to reboot the server. This is based on information from the task manager and the measurements in vSphere Client. I understand that the task manager is not an accurate measurement when AWE is active but that’s the best I’ve got
at the moment.
Here's what we've done thus far:
Looked through the logs on the SQL Server and found the following:
In the System log, Resource-Exhaustion-Detected appeared at the same time but the highest memory consumption was services.exe at 125MB. Doesn’t seem to be the culprit.
In the Applications log, started getting MSSQLSERVER errors indicating ‘The Server was unable to load the SSL provider needed to login.’ These errors persisted through the downtime.
In the SQL Server Log File Viewer, we see the following errors, though I’m not sure that they are at all related:
A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 0 seconds. Working set (KB): 4464, committed (KB)
66976, memory utilization: 6%
(About 4.5 hours later) Warning: the available page file has dropped below 4Mb. It is at this point – seemingly – that the memory usage has jumped up to near 100%.
The virtual server has 8G of RAM allocated. However, within the vSphere Client, the Memory Granted and the Memory Consumed seem to be at the same value…meaning that
the consumed value seems to be at 100% under normal operating conditions. Not sure why that is.
If anyone has any recommendations or areas to look, we would certainly appreciate your assistance! Thanks in advance.
Tony

I thank you guys so much for the rapid response! Please forgive the delayed response. All of this is on a DoD network and I cannot post to blogs on government machines. I have to go to a private
machine. Below is the information you asked for:
The Max Server Memory is 5.0GB and the Min Server Memory is 0.0GB
I have PerfMon currently running to try and capture as much information as possible.
We are getting a few other errors in the SQL Log that has given me some concern:
Failed Virtual Allocation Bytes: FAIL_VIRTUAL_RESERVE 65536
Memory Manager VM Reserverd = 3673288 KB VM Committed = 55688 KB AWE Allocated = 0 KB Reserved Memory = 1024
KB Reserved Memory In Use = 0 KB
There is also a series of MEMORYCLERK and CACHESTORE errors following
The Server was unable to load the SSL provider needed to login. SSL is used…
o
I presume that this is due to the lack of memory to process these SSL request.
There are indeed several Error: 701, Severity: 17, State: 123
Below is the system information from SQL Server 2005:
Microsoft SQL Server Management Studio                   9.00.5324.00
Microsoft Analysis Services Client Tools                       2005.090.5324.00
Microsoft Data Access Components (MDAC)                6.1.7601.17514 (win7sp1_rtm.101119-1850)
Microsoft MSXML
            3.0 6.0
Microsoft Internet Explorer
8.0.7601.17514
Microsoft .NET Framework
2.0.50727.5477
Operating System
            6.1.7601
I run a query SELECT SERVERPROPERTY(‘edition’); and it shows ‘Standard Edition’ rather than ‘Standard Edition (64-bit).’
We are using Windows Server 2008 R2. I don’t believe that there was an x86 version released but I could be wrong.
I’ve actually looked at enabling the LPIM but we are on a domain that we have no control over and there are GPOs that make it very difficult if not impossible to gpedit but that is something
we can certainly look into with the domain owners if you think it might help.
I just ran the following script in SQL:
Exec sp_configure ‘AWE’
The response is name – awe enabled, minimum – 0, maximum – 1, config_value – 0, run_value – 0
There is no third party software on this server.
The Max Server Memory is set to 5GM
Again, I do appreciate all of your help. Please let me know if I can provide anything further.
Tony

SQL Server 2012- Memory Leak Issue

Team,
We are running a Mission Critical Application on SQL Server 2012 SP2(11.0.5058) which is configured on Always ON Synchronous mode. Offlate due to heavy development work, Application team have come up with stating memory issues. I have analysed all the areas
and everything looks normal. Please suggest if we have to patch the latest CU4 for SQL Server 2012 SP2.
The checks were performed on the below areas:
- Errorlog, System Logs - No errors reported.
- There are close to 8 Databases hosted on the instances which are all configured for AlwaysON. SQL Server is running on VM Infrastructure and the total physical memory allocated is 96GB out of which SQL is capped for 92GB.
-The Page Life Expectancy is healthy and is showing a greater number. There are no Signal waits either or pending memory grants.
- The writes are more than reads for one of the databases which is flagged with application team. There are no blockings & Deadlocks.
Please suggest me the future course of action and your inputs are much appreciated.
Best Regards,
Sharath

Actual issue is- Application team have reported a memory leak and their builds have significantly slowed down. They suspect that its Database memory leak. However I have verified from database end and gave the above inputs.
The AOAGs are good. I was looking for any pointers whether there are any bugs which is related to memory leaks in SQL Server 2012. I know all of them are addressed with SQL Server 2012 SP2.
Application team has NO idea about SQL Server do they ? And to say SQL Server has memory leak you have to actually prove it did they showed any proof. Its common for application team to say SQL Server is leaking memory because they are unaware about fact
by default SQL Server would take as much memory as possible and would release when SQLOS asks it to do so. This might give sign that it is leaking memory BUT IT IS NOT.
As you already said AOAG is working fine so I am presuming there is nothing much to worry. To monitor memory usage in SQL Server 2012 you can use below counters
SQL Server: Memory Manager-- Target Server Memory (KB)
SQL Server: Memory Manager--Total Server Memory (KB)
SQL Server: Memory Manager- Free Memory (KB)
SQL Server: Memory Manager--Database Cache Memory (KB)
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

Max Memory Settings Not Working (SQL Server 2008 R2)

I have 12 GB ram in sql server 2008 R2 of 64 bit server (Windows 2008 R2).
I have set the Max memory setting to 12288 MB Memory setting.
Still the usage of sql server process is around 14 GB.
Is Max memory setting not working?
I have also enabled AWE after all it is 64 bit.
Thanks

Problem is that: my OS is halting due to this RAM. I have 16 GB of ram and assigning 12 GB to SQL SERVER and rest is using for OS. Please guide me how to get information about actual memory usage from all sql server processes. like
all CLR etc
Hi,
Are you also running SSIS/SSAS/SSRS with database engine services. What do you mean by OS is halting ?
If you want to check whether SQL Server is facing memory crunch please have a look at perfmon counters from
this link
Sys.dm_OS_memory_clerks would be DMV helpful in tracking memory utilized by various processes
I have also enabled AWE after all it is 64 bit. Thanks
Please note AWE doe snot have any notable affect in 64 bit system.
Below will tell you memory used by SQLCLR
select single_pages_kb + multi_pages_kb + virtual_memory_committed_kb from sys.dm_os_memory_clerks where type = 'MEMORYCLERK_SQLCLR'
Below query will give you memory consumed by various clerk
SELECT type, SUM(multi_pages_kb)
FROM sys.dm_os_memory_clerks
WHERE multi_pages_kb <> 0
GROUP BY type
ORDER BY SUM(multi_pages_kb) DESC
Can you reduce max server memory to 11 G and see if it gives some relief
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

Sql Server max server memory

Hi,
I know that , max server memory property is about physical memory limit for buffer pool. But some says that, it is about Vas (virtual adress space) limit for buffer pool. I know that , Vas structure includes
physical memory and virtual memory. Then it means that max server memory is not equal max
physical memory for buffer pool.
Which one is true?

Both are true depending on the memory model your SQL Server is using
In conventional memory model. Max server memory is about memory limit for Bpool ( Bpool can be from RAM or Page file), so there is no guarantee that bpool will always be placed in physical memory it can be paged to page file when there is memory pressure.
In Lock pages and large pages memory model Bpool cant be paged and always placed in RAM so its limit for BPOOL in RAM
I assume you are referring Page file as virtual memory and RAM as
physical memory
Read http://mssqlwiki.com/2013/03/26/sql-server-lock-pages-in-memory/ and http://mssqlwiki.com/sqlwiki/sql-performance/basics-of-sql-server-memory-architecture/ you will get clarity
Thank you,
Karthick P.K |My blogs|My Scribbles|Twitter|My Facebook
Group|
www.Mssqlwiki.com
Please click the Mark as answer button and vote as helpful if this reply solves your problem

Run the SSIS Package using sql server Agent--Memory utilization Problem

Hi,
I have Created one SSIS Package it was working fine in BIDS but in SQL Server Agent it takes all the server memory and server gets very slow now.
in that ssis package i am using merge join,sorting tasks.Can you please suggest me how to handle in the memory usage for this..pls refer the below screen

Hi aravindhrm,
You can enable BufferSizeTuning logging event on the Data Flow Task to get how many rows in buffer. Or you can use Performance Counter to obtain more details about the buffers.
http://microsoft-ssis.blogspot.com/2013/04/performance-best-practice-more-rows-per.html
http://www.sql-server-performance.com/2009/ssis-an-inside-view-part-3/
Then, you can tweak the DefaultBufferMaxRows and DefaultBufferMaxSize size settings.
Besides, you can also go through the blog mentioned by Visakh and try suggestions such as increase OS pagefile size.
Regards,
Mike Yin
TechNet Community Support

SQL SERVER PHYSICAL MEMORY USAGE HIGH

HI Teams,
i am going threw one of my production high physical memory usage in SQL Server. It always
around 90%.When i reboot the server, it will initially good but end of the day it will around 95 to 98% physical memory usage.
please give the valid solutions..,
Regards,
DBA

This is an expected/normal behaviour in SQL Server box. Memory management is highly dynamic in SQL Server and will use the complete memory allocated to SQL Server. It is also important to set the MAX SERVER MEMORY for the SQL Server instance. You may not
need to worry about this unless you find any performance issues.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped.
[Blog]

SQL server client memory required

Hy
I want to ask, that I have a MS SQL 2000 Enterprise edition server. How much memory required per client. I know, the SQL system memory required (more 1 G) but my question is, if my SQL server use plus one client, how much memory must take in my blade?
pls help

Although there are some thumb rules out there, it is hard to tell as you did not specify which kind of access the users are doing at the database. For ressource intensive querying you should put more memory in your server, where on the other hand you would not have that much memory for users doing plain and simple (Select / DML ) operations. How many users do you have, how many are connected on average, what are they doing on the database ?
Jens K. Suessmeyer.
http://www.sqlserver2005.de
---

SQL Server 2008R2 memory issues

Hi Experts.
I have SQL Server 2008R2 installation,We allocated 102400MB(100GB) Memory out of 128GB Installed.
But Task manager is showing SQL Servr using 104 GB.Please some body let us know why SQL Server uisng more memory more than we allocated.
Please advise next step or recommendations if any
OS :Windows 2008R2 64bit.
DB:SQL Server 2008R2 64bit.
Thanks in advance.
Regards,

But Task manager is showing SQL Servr using 104 GB.Please some body let us know why SQL Server uisng more memory more than we allocated.
You should not refer to task manager for SQL server memory consumption. Its windows tool it always wont show you correct value.
Please use below query to SQL Server memory utilization
select
(physical_memory_in_use_kb/1024)Memory_usedby_Sqlserver_MB,
(locked_page_allocations_kb/1024 )Locked_pages_used_Sqlserver_MB,
(total_virtual_address_space_kb/1024 )Total_VAS_in_MB
from sys. dm_os_process_memory
100 G limit is put on SQL Server buffer pool. SQL Server can still use memory more than 100 G because few memory allocations for objects like, XML,SQLCLR, Linked server, backup , database mail etc are allocated directly by windows and sys.dm_os_process_memory
does not tracks it. So just relax this is normal
Task manager only show Working set.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
My Technet Wiki Article
MVP

SQL Server Time Zone settings

Hi Folks,
I am looking for some help on how we will handle time zone setting in a SQL Cluster. We currently have a six node SQL cluster with multiple instances running on it. I have been asked to supply a new Instance for a new project but the problem
is the users that will be using it are based in New Zealand and We are located in Dublin! They will be using a Dynamics Navision database on this Instance. So my question is can I set the time zone different on this new Instance to their time,
cant seem to find any details this. Most of the documentation seems to indicate you use the datetimeoffset feature or its usually handled within the Application. I am hoping its the latter but any help on this would be grateful, especially if somebody
had experience with the issue before.
Thanks
TD

That's quite the time difference, hope you're not on-call ;)
SQL Server doesn't maintain it's own time, it just inherits it from Windows, so in this case you'll have to leave the time as-is and allow the app to handle it. I've previously worked with navision over two time zones (only a one hour difference though) and
I believe it maintains dates in UTC.
Just be careful that any custom code you run in SQL Server jobs, etc also uses UTC.
Edit: The
Nav datetime is stored in UTC
A DateTime is stored in the database as Coordinated Universal Time (UTC).

MS SQL Server 2000 JDBC Settings

Hi,
I am new to weblogic and i am developing my final year project using weblogic 8.1 SP 3.0. I want to use MS SQL Sever as a database. Can anyone tell me how to configure MS SQL Server for weblogic and how to communicate with it with the help of an example. I have tried my best to configure it by searching material but it is not working. Please help. You can also send me the reply on my email id i.e [email protected]
Regards,
SameeR.

Deepak Vohra wrote:
Thanks for trying to help, but this below is unnecessary and counter-productive.
WebLogic comes already with a comprehensively superior JDBC driver for MS SQLServer
(2000 and up). Just follow the documentation at:
http://e-docs.bea.com/wls/docs81/jdbc_drivers/mssqlserver.html#1043185
Joe
To configure WebLogic with SQL Server:
1. Install the SQL Server with SQL2kdesksp3.exe
2. Add the SQL Server driver jar files msbase.jar, msutil.jar and mssqlserver.jar to the Classpath in the startWebLogic script.
3. In the administration console configure a new JDBC connnection. In the Configure a JDBC Connection Pool frame select MS SQL Server in the Database Type field. Select Microsoft???s MS SQL Server Driver (Type 4 ) driver as the Database Driver.
4. In the Connection Properties frame specify the Host Name as localhost, Port as 1433, Database User Name as sa and Password as the password used login to the database.
5. In the Test database connection frame specify the Driver Classname as com.microsoft.jdbc.sqlserver.SQLServerDriver, URL as jdbc:microsoft:sqlserver://localhost:1433
6. In the Create and deploy frame select the server to which the JDBC Connection pool is to be deployed.

How to automate Sql Server Configuration Manager settings?

For example, I have just installed Sql Express 2012, and need to configure it for use over the local network. Usually I just manually open Sql Server Configuration Manager -- Sql Server Network Configuration -- <myinstance>, and enable TCP/IP on 1433.However,
I am not going to be available to do this on every customer's computer. I need to do these steps using a script or something. Is there a way to do this?

Have a look at this stackexchange thread:
http://stackoverflow.com/questions/9138172/enable-tcp-ip-remote-connections-to-sql-server-express-already-installed-databas
There are two good options outlined there
1. install it with the /TCPENABLED=1 switch (in the original post)
2. Execute a wmi script post-install (in the answer)
Note: if you decide to use WMI the root path will be \root\Microsoft\SqlServer\ComputerManagement11 for 2012
I will have to support install time, and post install. Does TCPENABLED=1 also setup the 1433 port value in TCP/IP Properties - IP Addresses tab?

Sql server max function for decimal value

dear team
i have column which contains decimal value eg,
QuestionMasterId Studentid Score
19 1 9.01,
19 2 9.02,
19 3 9.35,
19 4 8.04,
i have to display the max score - that student score but when i am using the following query it is returning the int value
DECLARE @MAX decimal
SELECT @MAX=max(Score) from [QuestionPaperwiseScore] where QuestionMasterId=19
print @MAX
select Studentid,Score,@MAX-Score as diff from [QuestionPaperwiseScore] where QuestionMasterId=19
kindly help

Take a look at
BOL again. The default scale is 0. Thus it behaves like an INT.
DECLARE @Sample TABLE
QuestionMasterId INT ,
Studentid INT ,
Score DECIMAL(3, 2)
INSERT INTO @Sample
VALUES ( 19, 1, 9.01 ),
( 19, 2, 9.02 ),
( 19, 3, 9.35 ),
( 19, 4, 8.04 );
DECLARE @MAX DECIMAL(3,2);
SELECT @MAX = MAX(Score)
FROM @Sample
WHERE QuestionMasterId = 19
SELECT @MAX;
SELECT Studentid ,
Score ,
@MAX - Score AS diff
FROM @Sample
WHERE QuestionMasterId = 19

SQL Server Performance Issue in Memory

Dear All
Can you please help me out of this below issue.
My Server having : Windows 2012 SD 64 bit
SQL : SQL 2008 R2 64 bit SP1
Memory : 64 GB
SQL Min Memory : 45 GB and Max memory : 55 GB so remaining 9 GB available
but my sql server any time shows 94% memory utilization. i have checked below points
Physical Memory_MB Physical Memory_GB Virtual Memory GB
65536 64 8192
Buffer Pool Usage at the Moment
BPool_Committed_MB BPool_Commit_Tgt_MB BPool_Visible_MB
56320.000000 56320.000000 56320.000000
Total Memory used by SQL Server Buffer Pool as reported by Perfmon counters
Mem_KB Mem_MB Mem_GB
57671680 56320.000000 55.000000000
Memory needed as per current Workload for SQL Server instance
Mem_KB Mem_MB Mem_GB
57671680 56320.000000 55.000000000
Total amount of dynamic memory the server is using for maintaining connections
Mem_KB Mem_MB Mem_GB
912 0.890625 0.000869750
Total amount of dynamic memory the server is using for locks
Mem_KB Mem_MB Mem_GB
40296 39.351562 0.038429260
Total amount of dynamic memory the server is using for the dynamic SQL cache
Mem_KB Mem_MB Mem_GB
2056 2.007812 0.001960754
Total amount of dynamic memory the server is using for query optimization
Mem_KB Mem_MB Mem_GB
2880 2.812500 0.002746582
Total amount of dynamic memory used for hash, sort and create index operations.
Mem_KB Mem_MB Mem_GB
0 0.000000 0.000000000
Total Amount of memory consumed by cursors
Mem_KB Mem_MB Mem_GB
28464 27.796875 0.027145385
Number of pages in the buffer pool (includes database, free, and stolen).
8KB_Pages Pages_in_KB Pages_in_MB
7208960 57671680.000000 56320.000000000
Number of Data pages in the buffer pool
8KB_Pages Pages_in_KB Pages_in_MB
6710944 53687552.000000 52429.250000000
Number of Free pages in the buffer pool
8KB_Pages Pages_in_KB Pages_in_MB
234598 1876784.000000 1832.796875000
Number of Reserved pages in the buffer pool
8KB_Pages Pages_in_KB Pages_in_MB
0 0.000000 0.000000000
Number of Stolen pages in the buffer pool
8KB_Pages Pages_in_KB Pages_in_MB
263418 2107344.000000 2057.953125000
Number of Plan Cache pages in the buffer pool
8KB_Pages Pages_in_KB Pages_in_MB
135772 1086176.000000 1060.718750000
Page Life Expectancy - Number of seconds a page will stay in the buffer pool without references
Page Life in seconds PLE Status
111450 PLE is Healthy
Number of requests per second that had to wait for a free page
Free list stalls/sec
373
Number of pages flushed to disk/sec by a checkpoint or other operation that require all dirty pages to be flushed
Checkpoint pages/sec
8052165
Number of buffers written per second by the buffer manager"s lazy writer
Lazy writes/sec
1247
Total number of processes waiting for a workspace memory grant
Memory Grants Pending
0
Total number of processes that have successfully acquired a workspace memory grant
Memory Grants Outstanding
0
My User asking how much sql transaction takes out off 55 GB , and each transaction how much takes, how to find sql healthy and sql needs how much memory.
Thanks
Mohamed Udhuman

Issue i mentioned here, Memory bottleneck is available or not , how to avoid sql buffer pool takes more memory means.
Thanks
Mohamed Udhuman
Hello,
Your output you posted does not makes sense or may be I am not able to understand it..If you want through analysis I need following from you
1.
select
(physical_memory_in_use_kb/1024)Memory_usedby_Sqlserver_MB,
(locked_page_allocations_kb/1024 )Locked_pages_used_Sqlserver_MB,
(total_virtual_address_space_kb/1024 )Total_VAS_in_MB,
process_physical_memory_low,
process_virtual_memory_low
from sys. dm_os_process_memory
2 What is reason for keeping Max server memory and Min server mmory almost equal. 55 G is MAX and 45 G is min.
3. Does SQL server account has locked pages in memory privilege ?
4. Did you see any out of memory error ?
5 Please post output of DBCC MEMORYSTATUS and SP_readerrorlog on skydrive and post location here.
PS: SQL server utilizing memory is normal behavior ,what you posted does not exactly points to memory pressure and what seems to me cause here is poorly written queries running.
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers
My TechNet Wiki Articles

SQL Server Memory

Hi All,
I am not sure if this is a fair ask or no but this is something i want to learn much internals about sql server memory and how sql server responds to memory pressure and i wanted to see that practically.
Environment : windows 2003, 4 GB physical RAM, SQL server 2005 sp4.
Checking in if someone has some demo tsql scripts which can blow up memory so that i can setup the memory counters and monitor sql server memory usage.
Did anyone has done this earlier?
Thanks in advance.

Why do I see “A significant part of sql server process memory has been paged out. This may result in performance degradation.” By SQL Server In spite of having above mechanism to detect the system level memory pressure and scale
SQL Server memory?
There are couple of situations where SQL Server Process working set might be paged out by Windows despite these memory resource notification mechanism.
1.If windows is not sending the correct notifications to all listening processes at the right moment and thresholds
2.If SQL Server is not responding fast enough to the low memory resource notification from Windows
3.Conditions in Windows where working sets of all processes are trimmed
4.Windows might decide to trim a certain percentage of working set of various or specific processes
Above is from
A significant part of SQL Server process memory has been paged out.
Please use Marked as Answer if my post solved your problem and use
Vote As Helpful, if a post was useful to help other user's find a solution quicker.

SQL Server Max Memory Settings

Similar Messages

Maybe you are looking for