DB Engine :: Buffer Pool Extensions On Shared SSD
Oct 9, 2015
Extending the buffer pool onto an SSD drive that is shared ? For instance, if we had a mirrored system drive(The C logical partition) on SSD's, can we use the remaining space on that mirrored partition to extend my SQL 2014 buffer pool ? I understand that in this scenario, there is some competition for the I/O throughput between SQL Server's extended buffer pool and the OS. We intend to have the pagefile on a different disk, other than this specific SSD.Â
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Oct 8, 2015
extending the buffer pool onto an SSD drive that is shared ? For instance, if we had a mirrored system drive(The C logical partition) on SSD's, can we use the remaining space on that mirrored partition to extend my SQL 2014 buffer pool ? I understand that in this scenario, there is some competition for the I/O throughput between SQL Server's extended buffer pool and the OS. We intend to have the pagefile on a different disk, other than this specific SSD.
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Sep 24, 2015
I am reading about Buffer Pool Extensions, and how it stores data pages on media like an SSD, to speed up retrieval in future. Would this be useless if my mdf files are already on SSD media? At most, I envisage it meaning that instead of grabbing the data from the mdf, it would grab the data from the buffer pool extension drive, but if they are both on SSD's, I'm not sure of how much return I would see.
Has any user decided to use BPE when their data is already on SSD's, and have they noticed any improvement in these cases?
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Jan 23, 2015
I am sure I have seen in the past in a monitoring tool that PLE drops off to 0 whenever we do a backup. I was doing some reading around this however and found something that said backups use a different portion of memory external to the buffer pool (minmax settings).
Is this correct and how can I tell how much memory will be required for a backup?
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Apr 16, 2007
Hi, I'm trying to chase down some bottlenecks, and am currently tyring to figure out what's actually in our data buffer pool.
We've recently upgraded to SQL Server 2005 (sp2a); there's 4GB memory on the box (an active/passive cluster) with the /3GB switch set. I'm working on the learning curve for
sys.dm_os_buffer_descriptors and sys.allocation_units [and boy I sure wish SSMS's query windows wouldn't "copy" in HTML]. Based on BOL and some poking around, I've come up with the following query to list pages used within a given database:
SELECT
count(*) cached_pages_count
,isnull(obj.name, '<unidentified object>') TableName
,obj.index_id
,ind.name
from sys.dm_os_buffer_descriptors bd
left outer join (select
object_name(object_id) name
,object_id
,index_id
,allocation_unit_id
from sys.allocation_units au
inner join sys.partitions p
on au.container_id = p.partition_id -- 2005 compatible, but maybe not in future versions
) obj
on bd.allocation_unit_id = obj.allocation_unit_id
left outer join sys.indexes ind
on ind.object_id = obj.object_id
and ind.index_id = obj.index_id
where bd.database_id = db_id()
group by obj.name, obj.object_id, obj.index_id, ind.name
order by cached_pages_count desc
This would appear to list how many pages are sitting in our buffer pool for which objects for the currently selected database. The thing is, for our "main" database, the vast majority of pages fall in that "unidentified" bucket -- their allocation_unit_ids are not in sys.allocation_units (or tempdb, I checked there just in case).
My question is: what are these pages? Where is this data coming from? Might these somehow be related with our execution/query cache, which appears to be larger than our data cache?
As may be obvious, this is all new to me, and any help would be greatly appreciated!
t
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Mar 15, 2006
Hello:
I tried to synchronize the SQL 2000 database with the SQL mobile server on PDA with SQL server management studio from SQL 2005. I got the error as €œThe buffer pool is too small or there are too many open cursors. HRESULT 0x80004005 (25101) €?. The SQL database file size is 120MB.
I create the .sdf file on PDA with the following C# code:
string connString = "Data Source='Test.sdf'; max database size = 400; max buffer size = 10000;";
SqlCeEngine engine = new SqlCeEngine(connString);
engine.CreateDatabase();
I think the 400MB max database size and 10000KB max buffer size are big enough to hold that SQL database data and I have already successfully synchronized my PDA with another smaller SQL server database file. I have been kept trying and searching this for couple of days and still can not figure it out.
Moreover, the synchronization always stops at the same table.
Please help and a lot of thanks in advance.
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Oct 20, 2011
How do i check the size of the datacache allocated from the buffer pool by sql server?
DMV or anything to show me the pool allocation sizes for the various pools in sql server i think i may be able to work from there.
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Feb 2, 2006
I am working with merge replication. The db server is running Windows 2003 Server Std x64 with SQL 2005 Std x64. The IIS server is running Windows 2003 Server Stx x86. The clients are Windows Mobile 5.0 running SQL 2005 Mobile.
I have previously been able to get the test client to initialize a subscription to the publication. I made some changes recently and added about 7 tables, bringing the total articles to 104. Some of the articles have unpublished columns, which means they are using vertical filtering as well. This publication is also using parameterized filters. During publication creation, there are several warnings that "Warning: column 'rowguid' already exists in the vertical partition".
The snapshot agent runs without any errors. When the client attempts to initialize, I get the error "The buffer pool is too small or there are too many open cursors."
My question is 2 part. First, what is causing this error, and second, how can it be resolved?
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Jul 7, 2015
My Integrity job started failing recently with the following error. Msg 701, Level 17, State 123, Line 1 There is insufficient system memory in resource pool 'default' to run this query. Process Exit Code 1. The step failed.
select @@ version
Microsoft SQL Server 2008 R2 (SP2) - 10.50.4033.0 (X64)
 Jul 9 2014 16:04:25
 Copyright (c) Microsoft Corporation
Developer Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1) (Hypervisor)
System is having 4GB RAM and SQL is using most of it. It has 2 processors.
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Oct 30, 2015
I'm collecting performance data via DMV to check the buffer hit ratio on several servers. Sometimes I get values high above 100% hit Ratio.
Example (50050%):
SQLServer:Buffer Manager:Buffer cache hit ratio 2002
SQLServer:Buffer Manager:Buffer cache hit ratio base 4
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Aug 3, 2015
I've a spatial (GIS) Data which is used frequently insertion, updation.
5 lakh records insertion in daily basis. when I trying to generate reports last 3 days or one weak, it takes 20-30 minute.
very disappointing while playing with clients. how to boostup and perform fast.
I think as so once we set query plan in buffer permanently then i would be faster than ever.
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Sep 12, 2014
Our server administrator forwarded some messages from SCOM that indicate:
SQL DB Engine 2012 Page Life Expectancy and Buffer Cache Hit Ratio is too low
When I logged into the offending server, I could not find anything in the SQL Log File that indicates this.
I was wondering how did SCOM identify this issue - where in SQL Server would this have been reported to SCOM?
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Feb 21, 2007
hi i'm having this error on my application"cannot allocate more connection.connect pool is at maximum increase max pool size" the proble is when i do testing this error does not apply it only Appears when the application is been used by many people
How can I resolve this?
Thanks
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Feb 11, 2004
What does this error message imply?
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Apr 18, 2012
I encountered the following error while attempting to preview an RDL report I was developing in VS2010 using SSDT:"The size necessary to buffer the XML content exceeded the buffer quota"
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Oct 7, 2015
We have a set of reports with same header section in all the reports. So while developing a new report i used to copy that header section to the new report with same dataset names (without any change) , but while rendering the report it is throwing error " The size necessary to buffer the XML content exceeded the buffer quota".
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Apr 28, 2006
Hi
I have a master package that executes a series of sub packages run from a SQL Agent job. One of those sub packages has been stable for a week, running at least once per day, but it just failed despite having been run once already today with the same set of input data.
There were a series of errors showing in the event log for the Execute Package Task starting with "Buffer Type 15 had a size of 0 bytes.", then "The buffer manager failed to create a new buffer type.", then "The Data Flow task cannot register a buffer type. The type had 32 columns and was for execution tree 3.", then "The layout failed validation." and finally "Error 0xC0012050 while loading package file "C:[Package].dtsx". Package failed validation from the ExecutePackage task. The package cannot run.".
SQLIS.com reports the constant for the error code as DTS_E_REMOTEPACKAGEVALIDATION ( http://wiki.sqlis.com/default.aspx/SQLISWiki/0xC0012050.html ).
I then ran the package on my dev machine in BIDS and it worked fine, so I re-ran the job on the server and this time that package executed ok, but another one fell over but did not put anything in the event log.
Does any one have any idea what happened?
TIA . . . Ed
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Mar 6, 2008
Good day everyone,
I'm experiencing a completely random warning from any given row count component within any given data flow task. It occurs sporadically. Whilst distracting, I don't see any adverse effects to the data after the packages complete. Can someone weigh in on this warning and let me know if it is indeed benign or what I maybe able to do to fix it?
Here's the warning:
"A call to the ProcessInput method for input 75997 on component "CNT Rows sent for STG table" (75995) unexpectedly kept a reference to the buffer it was passed. The refcount on that buffer was 4 before the call, and 5 after the call returned."
Thanks,
Langston
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Dec 19, 2007
When I look into our LOG directory for logs generated by our SSIS packages I notice that the logs do not always have the extension .LOG. When analyzing those packages I see no user changes on the LOG settings; all packages have default LOG settings.
How is this behaviour explained? And is there a way to make sure all packages have this .LOG extension? As it is now it looks unruly, messy.
TIA,
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Apr 6, 2007
The scenario is as follows: I have a source with many rows. Each row has a column called max_qty_value. I need to perform a calculation using another column called qty. This calculation is something similar to dividing qty/(ceiling) max_qty_value. Once I have that number I need to write an additional duplicate row for each value from the prior calculation performed. For example, 15/4 = 4. I need to write 4 rows to the same target table as in line information for a purchase order.
The multicast transform appears to only support fixed and/or predetermined outputs. How do I design this logic in SSIS to write out dynamic number of rows to a target table.
Any ideas would be greatly appreciated.
thanks
John
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Apr 25, 2008
Hi i've 6 files with the same name part but all have a different ext. The 17 always changes to the current week number
xbouns.A17
xbouns.B17
xbouns.C17
I want to import these files into a database table. So I've create a foreach loop and select the foreach file enumerater but am not sure if this is the right way to go about it some help woth be great thanks.
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Apr 28, 2008
Hi i've 6 files with the same name part but all have a different ext. The 17 always changes to the current week number
xbouns.A17
xbouns.B17
xbouns.C17
I'd like to do this within a SSIS package some help in getting this to work would be great.
Thanks
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Jul 5, 2006
The project I'm working on has been developed using SQL 2005 Developer Edition and VS 2005, so up until now VS has been handling the task of deploying my C# managed code stored procedures to the database.
Now it's time to deploy a beta of the product, and we want to use SQL 2005 Express, and take advantage of it's new XCOPY deployment mode which in turn means we can also take full advantage of Click Once for our software updates. The idea here is that we can deploy new or updated stored procedures in a managed DLL using Click Once, making updates presumably more simple and robust.
So the steps we need to complete at runtime are:
1. Dynamically load and access the database MDF file using SQL Express (done).
2. Enable CLR Integration for the dynamically loaded DB (done)
3. Instantiate all of the stored procedures - help!
Looking at the docs, it seems we have to execute the following SQL for each and every SP:
CREATE PROCEDURE <Procedure Name>
@inputArg2 type, @inputArg2 type, @inputArg3 type OUTPUT
AS EXTERNAL NAME <Assembly Identifier>.<Type Name>.<Method Name>
But, we're talking about literally hundreds of stored procedures that need to be instantiated here, which obviously means a lot of double-definitions and a fairly high chance of bugs creeping in.
Surely there has to be a better way?
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Mar 6, 2007
Hello.
I am attempting to document the various files that are incorporated into a reporting services project and need a more official explanation or defintion of the particular file and it's purpose. I understand what most of the files are and what they serve but would prefer to document it using Microsoft's official explanation so that we can decide which files may require that we source control them.
I have tried searching MSDN for 'file extentions',' file types', and typing in the individual .xxx extensions in to see if there is a documented definition for those files but seemed to get results that do not give me an official definition, didn't come close or were entirely not related.
.sln, .suo, .rds, .rdl, .rdl.data, .rptproj, .rptproj.vspscc, etc
Any links to the official explantion or definition of the files that make up a reporting services report project and their function/importance to the project would be appreciated.
Thanks.
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Jan 25, 2008
Quick question...
Is a report rendered as PDF, a real PDF?
I want to deliver reports for an application we are developing via or current ECM system. I need the report to be full text indexed. A TIFF wrapped in a PDF isn't always the best thing for full text indexing.
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Apr 17, 2006
A little history:
I have an app that lives on a single server including the SQL database as well as the asp, xsl, etc files.
Due to space issues I've copied my DB to a remote server.
Everything looks to be working well.
All dropdowns (pulled fom a view on the remote db) populate etc.
The problem arises when I try to query the remote DB.
I recieve the following error.
Microsoft XML Extensions to SQL Server error '80004005'
SQLXML: error loading XSL stylesheet
Any thoughts?
Thanks
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Feb 28, 2008
Hello all,
I am making a query which will select those records from table where a column data ends with a particular extension,i.e.
I want the query to fetch the rocords where FileName(column name) ends with .JPEG or .GIF or .BMP.
I have five records in table and FileName(columns name) contains three .JPEG ,one .GIF & one .BMP files name.
How can i get for a particular extension?
Thanks in advance
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Apr 12, 2007
Hi,
I'm having a lot of trouble trying to set up a custom security extension with Reporting Services 2005. Following the VB example from McGraw Hill Osborne (http://www.mhprofessional.com/product.php?cat=112&isbn=0072262397&cat=112), I've compiled the .dll for the extension and made the changes to the ReportManager and ReportServer .config files. After I reset IIS and return to the RS website, it displays "The report server has encountered a configuration error..." and I get a message in my System Event log:
The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID
{BA126AD1-2166-11D1-B1D0-00805FC1270E}
to the user MYMACHINEASPNET SID (S-1-5-21-1708537768-839522115-1343024091-1005). This security permission can be modified using the Component Services administrative tool.
Wondering if anyone else has had similar trouble and how did they get around it?
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Jul 8, 2004
Hi All
We have requirement in Reports. When ever report is sent to file share using Reporting Services File Share extension than details of that file should be saved in database.
How can we achieve this functionality? What is the best possible way of achieving this?
Please let me know the solution.
Thanks in advance
Rehan Mustafa Khan
HCL Technologies
Noida,India
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Jan 10, 2007
In Sql Reporting Services 2005 (This is bolded because this same error is all over the web for Sql Reporting Services 2000 and thats not where my problem lies) I schedule a report to be emailed. However when the delivery extensions Deliver method is called I get the following error
Failure sending mail: The report server has encountered a configuration
error. See the report server log files for more information.
In the log it shows the following
ReportingServicesService!emailextension!4!01/10/2007-12:21:01:: Error sending email. Microsoft.ReportingServices.Diagnostics.Utilities.RSException: The report server has encountered a configuration error. See the report server log files for more information. ---> Microsoft.ReportingServices.Diagnostics.Utilities.ServerConfigurationErrorException: The report server has encountered a configuration error. See the report server log files for more information. at Microsoft.ReportingServices.Authorization.Native.GetAuthzContextForUser(IntPtr userSid) at Microsoft.ReportingServices.Authorization.Native.IsAdmin(String userName) at Microsoft.ReportingServices.Authorization.WindowsAuthorization.IsAdmin(String userName, IntPtr userToken) at Microsoft.ReportingServices.Authorization.WindowsAuthorization.CheckAccess(String userName, IntPtr userToken, Byte[] secDesc, ReportOperation requiredOperation) at Microsoft.ReportingServices.Library.RSService._GetReportParameterDefinitionFromCatalog(CatalogItemContext reportContext, String historyID, Boolean forRendering, Guid& reportID, Int32& executionOption, String& savedParametersXml, ReportSnapshot& compiledDefinition, ReportSnapshot& snapshotData, Guid& linkID, DateTime& historyOrSnapshotDate, Byte[]& secDesc) at Microsoft.ReportingServices.Library.RSService._GetReportParameters(ClientRequest session, String report, String historyID, Boolean forRendering, NameValueCollection values, DatasourceCredentialsCollection credentials) at Microsoft.ReportingServices.Library.RSService.RenderAsLiveOrSnapshot(CatalogItemContext reportContext, ClientRequest session, Warning[]& warnings, ParameterInfoCollection& effectiveParameters) at Microsoft.ReportingServices.Library.RSService.RenderFirst(CatalogItemContext reportContext, ClientRequest session, Warning[]& warnings, ParameterInfoCollection& effectiveParameters, String[]& secondaryStreamNames) at Microsoft.ReportingServices.Library.RenderFirstCancelableStep.Execute() at Microsoft.ReportingServices.Diagnostics.CancelablePhaseBase.ExecuteWrapper() --- End of inner exception stack trace --- at Microsoft.ReportingServices.Diagnostics.CancelablePhaseBase.ExecuteWrapper() at Microsoft.ReportingServices.Library.RenderFirstCancelableStep.RenderFirst(RSService rs, CatalogItemContext reportContext, ClientRequest session, JobType type, Warning[]& warnings, ParameterInfoCollection& effectiveParameters, String[]& secondaryStreamNames) at Microsoft.ReportingServices.Library.ReportImpl.Render(String renderFormat, String deviceInfo) at Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.ConstructMessageBody(IMessage message, Notification notification, SubscriptionData data) at Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.CreateMessage(Notification notification) at Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider.Deliver(Notification notification)
So it seems to be failing at GetAuthzContextForUser
I've set up my smtp as out domain email smtp, given the accounts all the permissions I could (Even going to far as to give Everyone permissions everywhere)
Currently my IIS, SQL 2005 and reporting Services 2005 as well as my local SMTP is running on the local machine account.
I cannot seem to get it to work, or even give me a different error.
Could anybody please tell me what needs permission where and what settings I need to have set up for this not to happen.
Some extra information
I'm using Windows XP to develop on however the server where this will eventually run is Windows Server 2003
I'm using ASP.NET 2 and SQL Reporting Services 2005 and SQL 2005 with sp1 loaded
Any help would be appreciated
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Apr 24, 2007
Hi,
Have compiled and set up a custom security extension for SQL Reporting Services on my local machine and got it working. However, I'm trying to copy the extension across to a different server. So far, I've tried copying the updated dlls straight from my machine to the server and making the relevant changes in Reporting Services .config files (rsWebApplication.config, rssvrpolicy.config, etc)
Initially, the Forms authentication redirects to a login page as expected. However, when we try to submit a login name and password from this login page, it throws this error message:
"Invalid URI: The format of the URI could not be determined."
Is copying the dlls straight across a bad idea?
If anyone has encountered a similar issue, do you know if there are there certain things I should be checking for, or have missed, when trying to replicate a custom security extension on a different machine?
(FYI, the original server where it worked was Windows XP SP2, new server is Windows Server 2003 SP1)
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Jan 3, 2007
I developed nice reports using custom data processing extensions. When I deployed the reports on my report server (I am using the express edition of SQL Server 2005) I was surprised to see that my reports were not rendering successfully.
After searching the web, I found this page listing the supported/unsupported features of SQL Server 2005 Express Edition: http://msdn2.microsoft.com/en-us/library/ms365166.aspx
On this page it clearly says €œThe Reporting Services API extensible platform for delivery, data processing, rendering, and security is not supported.€?
Is there a way to get my reports to work on the express edition?
If not, which minimal version of SQL Server should a buy to get it to work (workgroup, standard or enterprise)?
Thanks for your help.
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Nov 15, 2006
Hi All,
I have been stuck with this problem since few days, need help regarding the same. I am enclosing the problem description and possible solutions that I have found.
Can anyone please help me out here?
Thanks and regards,
Virat
Problem Description:
I have a requirement for which I have created a data driven subscription in
SQL Server 2005, the whole thing works like this:
I have a report on Report Server which executes a stored procedure to get
its parameters; then it calls another stored procedure to get data for the
report; then it creates the report and copies it to a file share. This is
done using data driven subscription and the time set for repeating this
process is 5 minutes.
You can assume that following are working fine:
1. I have deployed the report on the Report Manager (Uploaded the report,
created a data source, linked the report to data source) - manually, the
report works fine.
2. Created a data driven subscription.
3. The data driven subscription calls a stored procedure, say
GetReportParameters which returns all the parameters required for the report
to execute.
4. The Report Manager executes the report by calling a stored procedure, say
GetReportData with the parameters provided by GetReportParameters stored
procedure; after it has generated the report file (PDF) is copied to a file
share.
For each row that GetReportParameters stored procedure returns a report (PDF
file) will be created and copied to file share.
Now, my question is
1. How to I get a notification that this file was successfully created
or an error occurred?
2. The only message that reporting service shows on 'Report Manager >
My Subscriptions' is something like "Done: 5 processed of 10 total; 2
errors."
How do I find out which record was processed successfully and which ones
resulted in an error?
Based on above results (success or failure), I have to perform further
operations.
Solutions or Work around that I have found:
1. Create a windows service which will monitor the file share folder
and look for the file name (each record has a unique file name) for the
reports that were picked up for PDF creation. If the file is not found, this
service will report an error. Now, there's a glitch there; if a report takes
very long time to execute it will also be reported as error (i.e. when this
service checks for the PDF file, the report was currently being generated).
So, I can't go with this solution.
2. I have also looked at following tables on ReportServer database:
a. Catalog - information regarding all the reports, folders, data
source information, etc.
b. Subscriptions - all the subscriptions information.
c. ExecutionLog - information regarding execution of the subscriptions
and the also manual execution of reports.
d. Notifications - information regarding the errors that occurred
during subscription execution.
For this solution, I was thinking of doing a windows service which will
monitor these tables and do further operations as required.
This looks like most feasible solution so far.
3. Third option is to look at DeliveryExtensions but in that case I
will have to manually call SSRS APIs and will have to manage report
invocation and subscription information. What is your opinion on this?
My environment details:
Windows XP SP2
SQL Server 2005
Reporting Services 2005
Please let me know if I am missing something somewhere...
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