Hi Everybody!
In the application I have, database interaction is mainly through stored procedures.
Currently the setting for procedure cache is 30%. Does anyone have experience with having had changed this and effect on performance?
Thanks!
- Manoj
Is there a way to drop clean buffers at the database level instead of the server/instance level like the undocumented €śDBCC FLUSHPROCINDB (@dbid)€??
Is there a workaround for €śdbo€? to be able to flush procedure and data cache without being elevated to €śsysadmin€? server role?
PS: I am aware of the sp_recompile option that can be used to invalidate cached execution plans.
Thx.
Is there anyway to clear the procedure cache of a single procedure?
View 9 Replies View Relatedhi,In my code i have to increment progress bar based on percentagecompletion of Stored Procedure.I am not to get any solution on this.Please Help me on this issue.I am using win forms Visual studio 2005 and Sql server 2005.Thanx in advanceNitin
View 3 Replies View RelatedI know this might be a dumb one, but what the heck. My new 7.0 server's procedure cache
stays at 100%. After researching this looks like what I want. Nay response appreciated.
Ours is a MSSQL Server Client server application with very minimal usage of Store procedures.
The proc cache is configured at 5%.I execute "dbcc proccache" to keep track of the proc cache.
I have seen that the "proc cache size" reduces to a very small a amount when there is peak usage.
It starts at 42,000 and comes down to 400, though it is always greater than "proc cache used".
I am worried if this causes crashes.
Please advise why this happens and solutions if any.
Thanks in advance,
Ramakrishna seelam.
Hello folks!
We are going to install SQL server 6.5 with MSMQ.
And set 128M memory for SQL Server.
What % Procedure cach do you recomend to set?
Thanks,
Alona
I have installed a SQL Server diagnose tool for evaluation. It prompts and warns me that "Procedure Cache hit rate is for example 15%. Its help indicates:
The Procedure Cache Hit Rate alarm is raised when the ratio between the number of times SQL Server looks for a plan in the procedure cache and the number of times it does not find a required plan in the procedure cache falls below a threshold.
A low procedure cache hit rate indicates that SQL Server is finding fewer of the query execution plans it needs already in memory and therefore has to perform more compiles. These extra compilations will degrade SQL Server performance by causing extra CPU load.
What can I do to increase the rate?
Canada DBA
Is 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
Is there a way to increase the size of the procedure cache. Or is it only a auto configuring option.
I have 2gb of memory, and when I check the size of the procedure cache it is just 10mb. I would like to increase this to around 50mb. Not sure if there is an setting to do this. Had a look on BOL could not find anything.
thanks
Jane
I'm putting together some monitor scripts, have buffer cache ratio etc etc but struggling to get an accurate script for the current procedure cache hit ratio...
View 1 Replies View RelatedI have a 32 bit SQL 2005 EE clustered installation with 10GB of physical memory and AWE enabled. Our monitoring tool, Spotlight, is reporting the Procedure Cache to be 384MB and a Hit Rate of 75% on a fairly regular basis. Sometimes the Procedure Cache increases to 495MB and a Hit Rate of 82%.
(1) With 2005 can the Procedure Cache be increased?
(2) What is the max size of Procedure Cache?
(3) How do I increase the Hit Rate to a higher percentage?
I do not encounter the issue on any other SQL Server installation, however this is our only cluster.
DBCC PROCCACHE
num proc buffs = 64889
num proc buffs used = 1135
num proc buffs = 1135
active proc cache size = 2896
proc cache used = 364
proc cache active = 364
Thanks, Dave
Using SQL Server 2000. When does SQL flush or clear the procedurecache? I am dynamically creating and dropping stored procedures (SP).Does SQL clear the cache for the SP that has been dropped? If not,when the SP is recreated (with the same name), does SQL use theexecution plan from cache?Thank you in advance.Jack
View 2 Replies View RelatedMy server (SQL 2005 SP2) typically runs with a procedure cache usage of about 92% or higher... lately it seems like at some point in time during the day it just drops to anywhere between 50% and 65%... with this comes horrible server performance and many snowball effects. If I clear the procedure cache it will go up only about 10% for a minute or two. The only way I can get it to recover completely seems to be restarting the SQL service. Then it will be fine till the next incident. The database is a read only (not set to read only but no updates other than replication). and the same SPs are run over and over and over throughout the day. also did notice that the compiles of the SPs goes up drastically at this point also. not sure if this is part of the cause or part of the effect.
CPU is normal. response from anything (even sp_who) is slow.
i do not understand the way procedure cache works completely so I thought I would ask for some direction.
Any ideas where to look or where to start???
Any thing I can do to catch this when it happens would be great.
thanks a head of time.
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....
from BOL:
"
Restoring a database clears the plan cache for the instance of SQL Server.
"
i'm seeing this behavior after log restores as well.
what's the reason the whole procedure cache is flushed?
thanks.
I was wondering if SQL Cache Dependency would be in fact invalidated if:
1. it was created based on a procedure type command.
2. if the select statement retrieves the data from multiple database tables
Any help would be more appreciated. I am stuck with the fact that none of the data bases on sql dependency is invalidated. I spent literally hours to understand what i am doing incorrectly.
Thanks
We see the following message in our error log.
WARNING: Clearing procedure cache to free contiguous memory.
It is accomonpanied by fairly intensive CPU activity.
We get this roughly once per working day.
Anyone have any idea why, and what we can do to stop this?
Regads,
Jim Plant
I want to analyze procedure cache, to find inefficient plans and parameter issues.
I do it trow DMV But my requests to DMV are very slow and demand resources because procedure cache is about several GB Actually I dont need on-line analysis.
Is it possible to have fast snapshot of procedure cache?
Hi 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?
The plan cache is cleared automatically (every 30-60 seconds) on our high load OLPT server.
Can't find a reason for it. I have been logging procedure cache thru dm_exec_cached_plans, every second for a couple of minutes.
It shows that it doesn't grow beyond 200Mb. SQLserver has 64Gb available.
DBCC FREEPROCCACHE is not executed.
dm_os_memory_clerks shows the same 200Mb max (approximately).
I disabled the SQL Agent, still happens, so it's not a job causing the problem.
I disabled the Resource Governor, still the same problem.
Hi everyone,
I posted a related thread before about this error below when I process a dimension. And seems that the solution by using "ClearCache" can not fingure out the issue when I want to process a mining structure...... .
OLE DB error: OLE DB or ODBC error: There is not enough procedure cache to run this procedure, trigger, or SQL batch. Retry later, or ask your SA to reconfigure SQL Server with more procedure cache.
; Sort failed because there is insufficient procedure cache for the configured number of sort buffers. Please retry the query after configuring lesser number of sort buffers.
Could someone please give me some suggestions?
Your help will be very appreciated:-)
Thanks^_^
Winnie
On 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.
Hello
I need a little help.
I'm working on this query but is not returning the value I want
SELECT CONVERT(float, hits)/ abat as 'AVE'
The hit column value is 3 and abat 4 I want to return 750 but so far I'm getting
.75 or if I try decimal returns .7500000000
Thanks
Robert
I need to write a page that figures out the percentage of students passing an assessment item where students are from a particular school, grade, gender, and are not medically exempt.
I did a Count Statement on all test taker, and another Count Statement for the number passing the item who were not exempt. Both of the statements are shown through seperate datalist controls. I then want to get the percentage by dividing the number passed by the number taken and mulitplying that by 100.
Is there a better technique or can I do this in a sql statement somehow?
I am havingSELECT DISTINCT Name, (( count(id_Name) * 100 ) / (SELECT count(id_Name) AS tt FROM dbo.Name)) as PercentageFROM dbo.NameGROUP BY Namebut I get only integers : 1,0,4,12I need : 1.63, 0.4, 4.05, 12.78how can I do it ?is there a better way to calculate a percentage ?thank you
View 5 Replies View RelatedHi i create a temp table that count how many A,B,C and D there where in a table.
I need calculate the percentage.It could be easy put the problem is that i cannot devide by the same number.
Here my temp table DECLARE @Temp table
(
strLastName varchar(50),
strFirstName varchar(50),
strReponse char(10),
strNomObjet nvarchar(200),
strDescripteurOrdre char(10),
strNomDescripteur nvarchar(200),
strObjetOrdre char(10)
)
I want to check how many A there is.
SELECT strNomObjet,strNomDescripteur,count(*) FROM @Temp
WHERE strReponse = 'A'
GROUP BY strNomObjet,strNomDescripteur
This will give me somthing like this
For the first one there 25 A
Second 27 A
NOMBRE ET OPÉRATIONSdémontre une compréhension du concept du nombre25
NOMBRE ET OPÉRATIONSpeut faire les opérations sur les nombres pour résoudre des problèmes27
STATISTIQUES ET PROBABILITÉSpeut suivre les étapes d'une démarche statistique26
RÉGULARITÉS ET RELATIONSutilise des régularités (suites logiques) pour résoudre des problèmes24
RÉGULARITÉS ET RELATIONSutilise des relations mathématiques (algèbre) pour résoudre des problèmes23
FORMES ET ESPACE (géométrie)utilise la mesure pour résoudre des problèmes17
FORMES ET ESPACE (géométrie)utilise les figures géométriques pour résoudre des problèmes22
STATISTIQUES ET PROBABILITÉSutilise les probabilités pour résoudre des problèmes27
FORMES ET ESPACE (géométrie)utilise les transformations géométriques pour résoudre des problèmes22
After that i use
SELECT count(*) FROM @Temp
GROUP BY strNomObjet,strNomDescripteur
That will give me how many person have been tested.
It will give me this
36
36
35
36
35
36
36
35
35
So i need to take the first 25
25 / 36 * 100 = 69.4%
27 / 36 * 100 = 75%
26 / 35 * 100 = 74.2%
I hope you understand what i mean!
Any idea?
Tks in advance
Hello!I have a need to create a function that will return a sublist ofelements from a table based on an associated column value and itsranking within the table (based on a percentage range).To expand with a simple example (only 4 elements):Element | Value---------------A102 | 5A506 | 10A322 | 15A342 | 20I would like to be able to return the range of elements that lie in the50-75% value range (e.g. third quartile range). Therefore with onlythese four elements I would want to return the element code 'A322'.I have attempted to achieve this by using SELECT TOP n PERCENT. I canbring back the required range by combining two select percentstatements.SELECT Element from ELEMENT_TABLEWHERE Element IN(SELECT TOP 75 PERCENT Element FROM ELEMENT_TABLE ORDER BY Value)AND Element NOT IN(SELECT TOP 50 PERCENT Element FROM ELEMENT_TABLE ORDER BY Value)The problem is that I cannot seem to pass a variable to this percentageso if I want another percentage range set, I ave to define anotherfunction.My question therefore is does anyone know either(1) a way I can pass a variable (n) to these SELECT n PERCENTstatementsOR(2) an alternative way of doing this?Many thanks!Andrew
View 3 Replies View RelatedHi team, I have a column 'a' of a table in which i would like to calculate a percentge of all entries in that column 'a' and place the results in a column 'c' beside column 'a'. Can this be done in sql server ??
View 5 Replies View RelatedLets say I have a table called ProductProductId Name Price Category1 Table 20.00 Furniture2 Chair3 Lamp Misc What is the SQL command that would give me as a percentage the completeness of a row, either complete or empty?For e.g. SELECT ... FROM Product WHERE ProductId = 2 ; should give a result of 50% as half the Columns in that row are empty.e.g. SELECT ... FROM Product WHERE ProductId = 3 ; should give a result of 25% as 1/4 of the Columns in that row are empty.I tried used something like SELECT COUNT(COLUMN_NAME) AS Expr1FROM INFORMATION_SCHEMA.COLUMNSWHERE (TABLE_NAME = 'Product')but dont know how to go forward.
View 2 Replies View RelatedOk guys, here is my query
GridSqlDataSource1.SelectCommand = "SELECT *, (([WinSum])/(([WinSum]) + ([LossSum]))) AS WinPercent FROM [ResultsView] WHERE ([CDIV] = @CDIV) ORDER BY [CTEAM]"
I need it to give me a 3 decimal percentage for WinPercent, but right now it is giving me 0 because as an example:
6 / 7 = 0 instead of 0.857
Any ideas?
Hello every one, I am trying to get the total percentage of a column
Regions
Workbooks Required
Workbooks Sent
Workbooks Returned
Workbooks Complete
A
20
21
20
18
B
33
33
33
30
C
19
29
18
16
D
9
18
8
8
Totals
Thanks in advance for any tips/solutions.
Hi Guys,
I am in need some uinderstanding of how to return the percentage of calls that were closed, between 1, 2 ,3, 4 and 5 days (possibly extendable to catch all those that were holding on to jobs to make it look like the were busy) as well as including all open jobs.
Because of my newbie status I am stumped at how to even start a query of this magnitude, and no this is not a school assignment :-) just some one who is very new to T-SQL and wanting to learn how to extract data from an MS SQL database server, as I find it fascinating, also my bosses find it fascinating the type of data I am returning for them so far.
So enough waffling.
This query will be run through VBA, any variable(s) will be supplied by VBA.
DB name = Envisage
Table name = HD_Call
Columns = DateRaised (datetime, null), DateCompleted (datetime, null)
Help in understanding how to construct this query will be grately appreciated.