Flush Query Cache
Nov 2, 2005Is there a clean way to flush the query cache so I can simulate the first execution of an SQL statement any time I want to?
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Unable To Connect To SQL Database 'MySite-Cache' For Cache Dependency Polling.
Dec 27, 2007 Im getting this error when trying to set up a cache dependency...are there any special permissions etc?From CS:SqlCacheDependency dep = new SqlCacheDependency("MySite-Cache", "Products");Cache.Insert("Products", de.GetAllProductsList(), dep); From connectionStrings.config:<add name="SiteDB" connectionString="Data Source=localhost,[port]SQLEXPRESS;Integrated Security=true;User Instance=true; AttachDBFileName=|DataDirectory|ASPNETDB.MDF" providerName="System.Data.SqlClient" />Also tried this using my machinename<add name="SiteDB" connectionString="Data
Source=<machinename>,[port]SQLEXPRESS;Integrated Security=true;User
Instance=true; AttachDBFileName=|DataDirectory|ASPNETDB.MDF"
providerName="System.Data.SqlClient" /> From web.config: <caching> <sqlCacheDependency enabled="true" pollTime="10000"> <databases> <add name="MySite-Cache" connectionStringName="SiteDB" pollTime="2000"/> </databases> </sqlCacheDependency> </caching> EDIT: So making progress I can't seem to get the table registered for cache dependency:The sample i have says"aspnet_regsql.exe -E -S .SqlExpress -d aspnetdb -t Customers -et"and the command line response is "Enabling the table for SQL cache dependency..An error has happened. Details of the exception:The table 'Customers' cannot be found in the database."Where does this "Customers" table come from? There is obviously not an application specific "Customers" table in aspnetdb I'm confused probably more by the example than anything....
SQL2K - Clean Buffer Cache And Procedure Cache.
May 31, 2007Is there a way to drop clean buffers at the database level instead of the server/instance level like the undocumented €œDBCC FLUSHPROCINDB (@dbid)€??
Is there a workaround for €œdbo€? to be able to flush procedure and data cache without being elevated to €œsysadmin€? server role?
PS: I am aware of the sp_recompile option that can be used to invalidate cached execution plans.
Thx.
Query Cache?
Jul 20, 2005Does SQL Server have a query cache similar to mysql, whereas the queryresult is cached, if the table has not been changed?If so, please refer me to more info.Thanks.--http://www.dbForumz.com/ This article was posted by author's requestArticles individually checked for conformance to usenet standardsTopic URL: http://www.dbForumz.com/General-Dis...pict170423.htmlVisit Topic URL to contact author (reg. req'd). Report abuse: http://www.dbForumz.com/eform.php?p=571428
View 1 Replies View RelatedSee Query Text From Cache
Mar 22, 2006Hi,
During a trace in profiler, I see some lines that indicate :
exec sp_execute 12
Or
exec sp_execute 24
I suppose these are query in cache and are recall by query processor ? If yes, how can I see this query in clear text ?
Thanks for help
How To Disable Query Cache?
May 8, 2008Hello,
I need to disable query cache in MS SQL Server 2005 Express. How can i do it?
My application can opertate ~2K records per sec (INSERT).
A million records costa me extra 142 Mb of RAM.
It means that sql server will take exrta 1Gb of RAM every hour.
I can't afford that.
Can anyone please help me?
Sys.dm_os_memory_cache_counters Vs. SQL Server:Plan Cache Cache
Feb 15, 2008Hi guys,
I am looking at the plan caches/cached pages from the perspective of
sys.dm_os_memory_cache_counters and sql serverlan Cache - Cache Pages
For the first one I am using
select (sum(single_pages_kb) + sum(multi_pages_kb) )
from sys.dm_os_memory_cache_counters
where type = 'CACHESTORE_SQLCP' or type = 'CACHESTORE_OBJCP'
a slight change from a query in
http://blogs.msdn.com/sqlprogrammability/
For the second just perfmon.
The first one gives me a count of about 670,000 pages only for the object and query cache and the second one gives me a total of about 100,000 pages for five type of caches including object and query.
If I am using the query from http://blogs.msdn.com/sqlprogrammability/ to determin the plan cache size
select (sum(single_pages_kb) + sum(multi_pages_kb) ) * 8 / (1024.0 * 1024.0) as plan_cache_in_GB
from sys.dm_os_memory_cache_counters
where type = 'CACHESTORE_SQLCP' or type = 'CACHESTORE_OBJCP'
it gives me about 5 GB when in fact my SQL Server it can access only max 2GB with Total and Target Server Memory at about 1.5 GB.
Does anyone have any idea what is going on?
How Always Keep Specific Query In Procedure Cache ?
Jun 1, 2001Is any way we can tell sql server to keep specific (long runing) query in procedure Cache.
I already tried to do this by creating job (run every 1 hr from 8 am to 6 pm)
but is not enough
Thanks
Clearing Of Cache In Query Analyser
Apr 3, 2002HI
May I know how to clear the cache area in the analyser as I need to
know the time taken for execution of an sql statement(query) before
and after creation of indexes.
tia
MK
SQL 2012 :: Query Notifications For More Than Just Cache?
Jan 13, 2015All the recommendations I see from Microsoft docs is to limit the use of Query Notifications (QNs) to notifying connected clients when changes to mostly-static reference or configuration data occur, and to keep the number of overall query forms in play and connected clients to a minimum. Any way regarding a more integral use of QNs and Service Broker from a web app to notify n-web servers (farm) of an update to data that could be updated concurrently and quite frequently, or with a system where the technique is used extensively with lots of different query forms?
View 0 Replies View RelatedTesting Query Performance - Clear Out Cache
Apr 3, 2006I am trying to improve the performance of a query. No matter how badit runs the first time, it runs really fast the second time.So how can I tell if I've done anything to improve the query if italways comes back quickly after the first run? I assume thequery/data/plan is in cache - how can I clean it out for my session?Thanks in advance for any help you can provide -
View 4 Replies View RelatedDB Engine :: How To Use Particular Query In Buffer Cache Permanently
Aug 3, 2015I'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.
T-SQL PRINT Flush?
Aug 21, 2004I have a long running (48 hour+) stored proc. I've added PRINT statements that print "1%", "2%", etc to provide progress so I can get a ballpark idea of how far along the process is. I ran the stored proc and realized that this won't work. I don't see the output of the print statements until the stored proc is completed. I'm running this from Query Analyzer (SQL Server 2000 SP3a).
For example, the following will wait ten seconds and then print both statements; it doesn't print one then wait, then print the other. Is there any flush command to make the print statements take effect immediately?
PRINT 'before'
WAITFOR DELAY '000:00:10'
PRINT 'after'
Flush Tables
Oct 12, 2005Quick question. Is it possible to Flush the tables in SQL Server, I know you can do it in MySQL, but not sure on SQL Server?
Thanks
Cachestore Flush
Mar 14, 2008I got the following error. What is it?
SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Object Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.
Canada DBA
SQL Server 2012 :: Query Tuning With Each Run Of Fresh / Blank CACHE
Jun 4, 2015I am using SQL Server 2012 Express.
I am doing performance tuning of SP/Query in Dev-Test environment.
I found that SQL Server caches plan between successive executions.
So if I test/execute SP 10 times, after 1st or 2nd execution, SQL server will pull-up plan-info from CACHE...Not from SQL SERVER Or Database...
Means i am not getting correct answer...
I found this 2 commands:
DBCC FREEPROCCACHE
DBCC DROPCLEANBUFFERS
But they say that executing above command might interfere/bother other people executing other query/sp on this server.
They also say that: Freeing the plan cache causes, for example, a stored procedure to be recompiled instead of reused from the cache. This can cause a sudden, temporary decrease in query performance.
Part of query was using Dynamic-SQL executed with EXEC command.
I replaced that with SP_EXECUTESQL.
How can I start testing of each SP-run with Fresh/Blank CACHE ?
SQL 2012 :: Buffer Cache And PLE (Page Life Expectancy) Query
Aug 17, 2015I'm getting an alert which states that both my Buffer Cache Hit Ratio and PLE are low on one of my SQL Servers though I'm not sure how to correctly check this.
I ran:
SELECT object_name, counter_name, cntr_value
FROM sys.dm_os_performance_counters
WHERE [object_name] LIKE '%Buffer Manager%'
AND [counter_name] = 'Buffer cache hit ratio'
Which gives me the Buffer Cache Hit Ratio, cntr_Value of 9 though its constantly dipping between 3-3000 and is never steady and I'm unsure if this is normal.
I also ran:
SELECT object_name, counter_name, cntr_value
FROM sys.dm_os_performance_counters
WHERE [object_name] LIKE '%Buffer Manager%'
AND [counter_name] = 'Page life expectancy'
Which gives me the Page life expectancy of 209061.
If these values would cause concern and if this is a normal Buffer Cache Hit Ratio? It's constantly dropping from high or low from what I can see. These scripts were pulled from another forum and I'm assuming they're showing the correct values.
Can You Cache A SSIS Lookup Component To Foxpro V7 With Parameterized Query?
Feb 24, 2006I am using a lookup component in a SSIS data flow. The lookup is a select to a foxpro table. THe lookup works fine with full cache selected. I cannot get the lookup to work with a partial or no cache. I have the latest Foxpro OLE DB driver installed which I understand to support paramaterized queries. Has anyone had success with using cached lookup to Foxpro? Does anyone know how to set the lookup properties of sqlcommand and sqlcommandparam? I am unable to find any examples in BOL or on the web.
Here are some details. IF I go with "use a table or a view" option with the default cache query I get initialization errors
[lkp_lab_worst_value [6170]] Error: An OLE DB error has occurred. Error code: 0x80040E14. An OLE DB record is available. Source: "Microsoft OLE DB Provider for Visual FoxPro" Hresult: 0x80040E14 Description: "Command contains unrecognized phrase/keyword.".
In the advanced editor I see
SQLCommand set to
"select * from `kcf`"
and SQLCommandParam set to
"select * from
(select * from `kcf`) as refTable
where [refTable].[patkey] = ? and [refTable].[dayof_stay] = ? and [refTable].[modifier] = ? and [refTable].[kcf_code] = ? and [refTable].[source] = ? and [refTable].[kcf_time] = ?"
I believe the above error is because Foxpro V7 does not support the inner subselect . In addition the query contains CRLF without a continuation character (";").
If I remove the CRLF in the sqlcommandparam query, using the advanced editor, I get this design time error "OLE D error occurred while loading column metadata. Check the sqlcommand and sqlcommandparam properties". The designer requires both properties to be set, its unclear to me how the interact.
I cannot find any examples in BOL or on the web on how to set these 2 properties. Can someone give me a few guidelines?
I can get past the design errors by changing sqlcommandparam to a plain select that is VFP 7 compatible ( I removed the subselect and the square brackets):
select * from kcf as refTable where refTable.patkey = ? and refTable.dayof_stay = ? and refTable.modifier = ? and refTable.kcf_code = ? and refTable.source = ? and refTable.kcf_time = ?
But then I get a runtime error
[lkp_lab_worst_value [6170]] Error: An OLE DB error has occurred. Error code: 0x80040E46. An OLE DB record is available. Source: "Microsoft OLE DB Provider for Visual FoxPro" Hresult: 0x80040E46 Description: "One or more accessor flags were invalid.".
[lkp_lab_worst_value [6170]] Error: OLE DB error occurred while binding parameters. Check SQLCommand and SqlCommandParam properties.
Any idea on what I should try next ?
How To Flush The Buffer To Trc File
May 7, 2004I want to trace the user logins by using a stored procedure. This script (sp_login_trace) is created by the SQL Profiler tool. (Once this procedure works well, I will use sp_procoption to run it automatically everytime the SQL Server startup.)
After I successfully created sp_login_trace, I run it (exec sp_login_trace). The trace process is started and TraceID is 1. (I use select * from ::fn_trace_getinfo(default) to verify it). However the file size of login_trace.trc is always 0 even after I use Query Ananlysis or Eneterprise manager to let some users to login into the SQL Server instance. (when I use SQL Profiler to start a trace, the trace file size will increase along with users continaully login in). At that time if I use SQL Profiler to open the login_trace.trc file, the system will give me an error message: No data since Empty File.
After I stop and delete the trace process, I find that the file size of login_trace.trc becomes 128K and I can see the login records caught by sp_login_trace if I use SQL Profiler to open this file again.
How can I flush the buffer to trc file frequently without need of stopping trace process?
Thanks for helps in advance.
Leon
How To Flush Buffer To .sdf File By OLE DB?
Sep 28, 2007Could anybody help me on how to do buffer flush before program exit?
I am using OLE DB to insert record to SQL CE database, but cannot control data commit, each time if I exit too quick, then all of inserted record cannot stored into database .sdf file. Thanks a lot!
Attach DB Causing Cachestore Flush
Mar 16, 2007I have detached a SQL Server 2005 database from one server and attached it to another SQL Server 2005 and I now get the following in the error Log and in the event viewer evry 10 - 20 minutes or so.
SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Object Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.
2007-03-16 12:37:14.64 spid17s SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'SQL Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.
2007-03-16 12:37:14.64 spid17s SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Bound Trees' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.
Starting up database 'DBName'
It appears under different SPID's 18, 20, 24 ...... and consistently has the 4 errors in a row
Full Text indexing is running for both servers but I dont know if this is the cause of the error.
I would greatly appreciate any help to get rid of this as I have trawled the net and not found anything of use.
Thank You.
Is There A SQL Server API To Flush All Buffers To Disk?
Jul 20, 2005I am looking for an API to flush all data in memory held by SQL Serverto disk. Also, is there a tool for SQL Server like eseutil forExchange that lets you correct a SQL database?
View 5 Replies View RelatedFlush Print Statements During Lengthy Procedure
Apr 3, 2007I'm working on a stored procedure, and I'm nearing completion. The procedure takes a while to run (it's a very large dataset), but that's not my issue. The problem is that I include several print statements, but I don't get to see any of them until the entire procedure has finished. Is there anything I can do to be able to see them as they are printed? Using sql server 2000 with management studio for 2005.
View 2 Replies View RelatedHow To Flush Data Stored In SSIS Buffer
Aug 2, 2007Hi,
I am working on my own data flow source component. Here is a fragment of this component code:
public override void PrimeOutput(int outputs, int[] outputIDs, PipelineBuffer[] buffers) { PipelineBuffer selectedBuffer = buffers[0]; string message; while ((message = GetMessage()) != null) { selectedBuffer.AddRow(); selectedBuffer.SetString(0, message); // how to flush data here? } selectedBuffer.SetEndOfRowset(); } private string GetMessage() { // we are retrieving some message here, this is a long-term process }
When a new row is added by this component to the buffer then this row is not immediately available to the next component in data flow. It is possible to configure SSIS in that way that each row is immediately sent to the next data flow component? If no also please inform me about that.
Thanks,
Rafal
SQL Server 2008 :: Is Only One Plan Is Kept For One Query In Plan Cache
Mar 14, 2015Is only one plan is kept for one query in plan cache?
i heard generally hash is created for a query and plan is search with this hash.
Error: Fcb::close-flush: Operating System Error 21(The Device Is Not Ready.) Encountered
May 23, 2007We are using sql server 2005 Enterprise Edition with service pack1
I got the following error messages in the SQL log
The operating system returned error 21(The device is not ready.) to SQL Server during a read at offset 0x00000000090000 in file '....mdf'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe system-level error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online.
fcb::close-flush: Operating system error 21(The device is not ready.) encountered.
I got these errors for about 2 hrs and after that I see these messages in the sql log
Starting up database ' '
1 transactions rolled forward in database '' (). This is an informational message only. No user action is required.
0 transactions rolled back in database ' ' (). This is an informational message only. No user action is required.
Recovery is writing a checkpoint in database ' ' ( ). This is an informational message only. No user action is required.
CHECKDB for database '' finished without errors on (local time). This is an informational message only; no user action is required.
Can anyone please help me in troubleshooting this issue. Why this migh have happened.
any help would be appreciated.
Thanks
Cache Hit Ratio Vs Buffered Cache Hit Ratio
Mar 13, 2003On Microsoft performance monitor, what is the difference between SQL Server Cache Manager: Cache Hit Ratio and SQL
Server Buffer Manager: Buffer Cache Hit Ratio? We have a production server where the buffer cache hit ratio is
consistently at 99%, which is normal. However, the cache hit ratio is 73%. What is the difference between the two
hit ratios, and why would we have such a significant difference between the two?
Any help or advice would be much appreciated.
SQL Cache Vs Cache
Jul 12, 2006I read about the SQL 2005 Buffer Cache and the .NET cache.I tried it on about 8000 users query. Both are fast....SQL 2005 being a little faster (probably due to I was sorting the .NET Cache).Any comments?
View 1 Replies View RelatedJob Cache
Jul 9, 2002Hi there,
We have cluster server and we are using sql server 7, everything was working fine on node a and when we move to node b and run the job from the jobs it gives the error message:
Error 22022:SQLServerAgent Error: job ox7bb7d7bf23b8974d8ea8f15e43e854cf
does not exist in the job cache
Can anyone help on this.
Thanks in advance.
Madhu.
Cache
Dec 3, 2001In Sybase, I can bind a database or table to cache, can I do the same
on SQL 7.0?
How To Cache ?
Sep 9, 2005Hi..
I don't know this is possible or not.
for example.. I have a blog site..
my entry links are like that
blog.asp?ID=33
blog.asp?ID=36
36 points "select * tbl where id=36"
And approximately BLOG #36 has 400 views everyday..
content is same.It never change..
Everyday my application performs "select * tbl where id=36"
with direct ASP or Stored Procedure..
Do you have any solution about this ?
How to improve performance..
Just imagine, If entry #36 had 2.000 views everyday ?
just example..
Of course the less perform query, the more performance..
Job Cache
Mar 14, 2008Hello!
When I create new job, I get a message "Job cache 97% full"
What should I do? And what IS a job cache?
Thanks!
Makkaramestari
Configuring SQL Cache
Apr 25, 2007Hi all,
I have a question regarding SQL caching.
I want to use SQL caching for my pages.I've gone through http://msdn2.microsoft.com/en-us/library/e3w8402y(VS.80).aspx article on msdn, where in step by step procedure is explained for this. But I have a slightly different situation. In the article, we need to configure our application from web.config by following...
<!-- caching section group --><caching> <sqlCacheDependency enabled = "true" pollTime = "1000" > <databases> <add name="Northwind" connectionStringName="NorthwindConnectionString1" pollTime = "1000" /> </databases> </sqlCacheDependency></caching>
Where in "NorthwindConnectionString1" is the SQLdatasource connection string. But I'm not using SQLDatasource, and have my own classes to build a connection datasource and get a dataset, and then bind it to my control.So in this case what should I write for the above "connectionstring" attribute. My connection string is in web.config only with a section defined. and in my application i'm reading from web.fing only.The connection section i'm using is as follows...
<ConnSettings>
<add key="ConnString" value="server=serverName;database=dbName;uid=dbuser;Pwd=password"/>
</ConnSettings>
I want to know how to configure my sql cache in this situation.
Thanks,
Mehul Mistry