% Processor And % User Time Opinion
May 26, 2004
I have a server with little control over most of the codeset and db design. Recently I have seen both the Processor - %Processor time and Processor - % User time go fom about 6.3 to about 24.3. The system queue length has also gone from about .2 to 1.1. In my humble opinion both of the are signs of a problem coming (luckily the cache hit ratio is still sitting at about 99%). I have been running profiler to catch the things that take more that 4500 MS, and I can probably tie the 2 together. Any opinions, or real world comparisons appreciated
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Mar 21, 2003
Trying to deal with a user complaint of slowness. Many variables looked at which look normal (Buffer cache, queue length,memory). Probably looks like a network issue. My question is what people consider acceptable when it comes to %disk time. My %disk time has increased from an average of 20% to 33% in recent months. My average disk read and average disk write have both been less than one. MY research has showed that more than 55% %disk time for ten minutes is considered a problem. Not there yet but seem to be slowly getting there. THe app running against my server is vendor written so can't change, also running log shipping which is probably inflating the numbers a little.
Any opinions appreciated.
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Mar 13, 2008
We are seeing that the %Processor Time for the sqlservr process in Perfmon is over 100%. I am trying to understand how can the percentage of use be over 100%, and why it is over 100%. Someone told me that if the machine has multiple processors, that it will be over 100%. If that is the case, how can I determine what the maximum and normal values are? If I have 4 processors, does that mean 400% is the max? Does not make sense since it is suppose to be a percentage value...
Could someone explain to me how the CPU Utilization value is being measured, and if it is going over 100%, why that is and how I can determine what the threshold should be for monitoring?
SQL 2005 on Windows 2003 cluster.
Thanks!
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Nov 10, 2015
Having a SQL Server 2012 Enterprise (x64) on a Windows 2012 R2. We need to know, a reliable way, the number of processor sql server is using at a give time. We already know how many total processor are available to sql by getting info from sys.dm_os_sys_info.
For instance, a server has 40 processors, we want to know how many of those are being used at a given time. Since the load on the server may not be that high, we would like to know how many processors we can eliminate and the load will still be unaffected.
After watching the server performance for a while, we are predicting we may only need 16. But we would like to get some statistics before we reduce it to this number.
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Mar 22, 2002
Hi,
While watching through performance monitor the processor time often goes high above the memory.
Could you please tell me how to find out which process is doing that.
Thanks
John Jayaseelan
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Apr 30, 2015
we have problems with our SQL Reporting Service 2012 (SSRS) server . We have setup Kerberos delegation between SSRS and the database server (SQL Server Always-on cluster) so users are authenticated down to the database. The issue occurs from time to time that SSRS loses the ability to delegate the user credentials to the database. At this point in time the Report Server logs contain rejected database connections because of ANONYMOUS logon. After restarting SSRS the problem is gone.
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Nov 26, 2007
I am running a query on a SQL Server 2005 database and encounter the following error message
"Internal Query Processor Error: The query processor encountered an unexpected error during execution."
There is a join between a table on the 2005 database and another on a 2000 database. I have run DBCC CHECKTABLE and found no errors on the two tables.
Anybody with ideas?
Thanks
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May 24, 2007
SQL Server 2005 9.0.3161 on Win 2k3 R2
I receive the following error:
"Error: 8624, Severity: 16, State: 1 Internal Query Processor Error: The query processor could not produce a query plan. For more information, contact Customer Support Services."
I have traced this to an insert statement that executes as part of a stored procedure.
INSERT INTO ledger (journal__id, account__id,account_recv_info__id,amount)
VALUES (@journal_id, @acct_id, @acct_recv_id, @amount)
There is also an auto-increment column called id. There are FK contraints on all of the columns ending in "__id". I have found that if I remove the contraint on account__id the procedure will execute without error. None of the other constraints seem to make a difference. Of course I don't want to remove this key because it is important to the database integrity and should not be causing problems, but apparently it confuses the optimizer.
Also, the strange thing is that I can get the procedure to execute without error when I run it directly through management studio, but I receive the error when executing from .NET code or anything using ODBC (Access).
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Sep 15, 2005
I have 2 tables:
Table 1 has:ID,FName,Lname
Table2 has:ID,PID,PFName,PLName, Flag
PID is a unique number -> (hh:mm:ss)
I need to run an update to table2 by setting the Flag to 1 and also creating PID.
I could use a join query to do this, but I am concern about PID (hh:mm:ss), because it may take less then 1 second to update and I will have duplicate PID.
Any idea what is the best way of doing this?
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Nov 14, 2007
Well, its kind of tricky, and i got into this.For example i have a column of zip, all US city state name and abbreviation, preffered name and an alternate name of each city in US, and also non-acceptable name of each preffered name..
Can you give me a hint, how many databse should i used?
for example, i search for a zip code, and the result will be the name of city or an acceptable name of city and there are non-acceptable name too..
well.i just need your opinion..hope you could get into this one.tnx
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Nov 3, 2005
This is more a theoretical question so I do not have any DDL (working)to post.Let's say that I have a query which needs to be filtered for specificaccounts while also needing several joins to retrieve additional data.Is it better to so one big SELECT / JOIN / WHERE statement? As inSELECT * FROM T1JOIN T2 ON T2.[Col1] = T1.[Col1]JOIN T3 ON T3.[Col2] = T1.[Col2] AND T3.[Col3] = T1.[Col3]and so on...WHERE T1.[Account] IN ('123', '456', '789')OR is it better to do an inner SELECT / WHERE and pass that to a SELECT/ JOIN? As inSELECT * FROM(SELECT * FROM T1WHERE T1.[Account] IN ('123', '456', '789')) ITJOIN T2 ON T2.[Col1] = IT.[Col1]JOIN T3 ON T3.[Col2] = IT.[Col2] AND T3.[Col3] = IT.[Col3]and so on...First glance logic says that the inner select is the way to go sincethe joins would have less rows to work with, as opposed to joineverything and THEN pulling out what is not needed. But the queryplanner sometimes seems to have a mind of its own... Does it know thatrows will be pulled so it does that first? If I follow the same"structure" with many different queries does in us the same logic allthe time or do I need to try the same thing for each and check it?How does this apply to situations where there is a UNION involved? Do Ido the union and then apply WHERE and JOIN to filter out rows and getadditional data, respectively, or do I filter out rows inside the unionand take the combined set and do the JOINS?SELECT * FROM(SELECT T1.[Col1], T1.[Col2] FROM T1UNION ALLSELECT T2.[Col1], T2.[Col2] FROM T2) CTJOIN T2 ON T2.[Col1] = CT.[Col1]JOIN T3 ON T3.[Col2] = CT.[Col2] AND T3.[Col3] = CT.[Col3]and so on...WHERE CT.[Account] IN ('123', '456', '789')versusSELECT * FROM(SELECT T1.[Col1], T1.[Col2] FROM T1 WHERE T1.[Account] IN ('123','456', '789')UNION ALLSELECT T2.[Col1], T2.[Col2] FROM T2 WHERE T2.[Account] IN ('123','456', '789')) CTJOIN T2 ON T2.[Col1] = CT.[Col1]JOIN T3 ON T3.[Col2] = CT.[Col2] AND T3.[Col3] = CT.[Col3]and so on...
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Mar 2, 2000
Hi,
I need your suggestions on a design issue:
I have 2 tables, Customers and Organizations. 1 Customer can be under many organizations. What would be the best way to design the db (2 choices) for performance (around 50000 customers):
1)
-Customer table
-Organization table
-Link Organization & Customer by creating a new tables with the following structure ---> CustomerID, OrgID,
2)
-A Customer tables that has a field called OrgID where the orgID is stored. If the customer has more organization related to him, we add another customer record and we put the new OrgID in the OrgID column. Examples:
Customer Table
--------------
CustomerID--Fname--Lname--Addresss-----OrgID
---------------------------------------------
1 Bob Marley 33 Africa org1
1 Bob Marley 33 Africa org2
1 Bob Marley 33 Africa org3
Please give me your suggestions,
Thank you for your time,
SASAN
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Jan 7, 2004
What is the better practice when joining tables in a query example 1 or 2? I've always joined tables together like example 2, but it seems that many people are advocates of example 1. Are there any differences performance wise between the two?
Example 1:
SELECT *
FROM authors AS a INNER JOIN publishers AS p
ON a.city = p.city
ORDER BY a.au_lname DESC
Example 2:
SELECT *
FROM authors AS a, publishers AS p
WHERE a.city = p.city
ORDER BY a.au_lname DESC
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Dec 18, 2007
I need to purchase a new computer for a small medical clinic which will basically only have one purpose: to answer to read and write queries to a SQL Server 2005 which is resident on that computer. Queries come from the current 8 stations (up to 14 stations in the future). Most of the time, only 3 stations will be active at a time. Queries are mostly to access patient file information, are not complex and are short-lived.
A friend of mine who owns a computer store just quoted me for a dual quad-core Xeon 5405 2GHz system with Windows Server 2003 10 Cals. I'm concerned about the following:
- What's the use in having 8 cores, each of them running at only
2GHz, when there's really only one service running (SQL Server
2005, likely Express Edition) on the computer. Does SQL Server
have the capability to make use of all cores? Otherwise, why
spend more for Xeon and so many cores instead of a single
C2D running at a faster speed of say 3GHz ?
- What would be the advantage of using a Windows Server over
Windows XP in a peer-to-peer configuration? I don't buy into
the 10 connection limit because the TCPIP.sys file can be
altered to move that limit up, so 14 stations does not trigger
the need for Windows Server in and of itself.
Thanks all!
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Apr 13, 2007
Hi all,
I am having problem with SQL connection at Godaddy where my pool connection gets MAX OUT. When it happens, I cannot access the database.This is the thread about the problem: http://forums.asp.net/thread/1665023.aspx
I just created this with "THREAD". I hope someone who has experiences with thread can give me some advice about my design. This is my first time.
static object Locked = new object();
public object ExecuteCommand(string queryStr, string type){ //*************************************************************************************// // ExecuteCommand: Returns an object // //*************************************************************************************// Thread t = null; lock(Locked) { SQLString = queryStr; switch(type) { case "ExecuteNonQuery": t = new Thread(ExecuteNonQuery); break; case "ExecuteScalar": t = new Thread(ExecuteScalar); break; case "GetDataReader": t = new Thread(GetDataReader); break; } t.Start(); t.Join(); } return null;}
First of, does this work at all? It runs, but is it a good design in term of Thread? Since I use LOCK, do I still need the t.Join() function? The switch with the three cases, is that OKAY? Basically, I'm clueless. If you read my other post, you will get an idea what I'm trying to do. Any feedback would be very very appreciated.
Thank you.
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Feb 7, 2008
Hi,
I was talking to my boss to day and our report request are not very consistant. We always having someone coming back to change something in our report. We were thinking of useing something called the Cube Analysis. Then it give our employees the raw data for them to run any standard query for themself. We have folks that want a report one way, but then they changed their minds and we are creating yet another report 4 or 5 times. what are your thoughts about this type of database?
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Jun 4, 2007
What's the current opinion on UDTs? Are they valuable? Do the benefits outweigh the costs? Are they an absolute no-no? Has there been anything authorative or groundbreaking on the topic since Alex P's blog back in October 2005?
http://weblogs.asp.net/alex_papadimoulis/archive/2005/10/20/428014.aspx
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May 8, 2007
I need some other opinions on whether or not this is considered a proper database design structure.
Here is the relationship...We have PEOPLE, that each can belong to a COMPANY.
PERSON_TABLE
Person_ID
Company_ID
COMPANY_TABLE
Company_ID
Then each person can trust other people of other companies, but can only trust 1 person per company.
My question is this. In order to maintain a constraint of 1 person per company, is it considered OK to add a the redundant column Company_ID to the PERSON_TRUSTED_TABLE(and then creating a composite primary key on the Person_ID/Company_ID) instead of just adding a trigger to the PERSON_TRUSTED_TABLE to uphold the constraint.
PERSON_TRUSTED_TABLE
Person_ID
Trusted_Company_ID
Trusted_Person_ID
I would appreciate anyone's opinion. Thanks so much!
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Apr 25, 2006
I am not that experienced in SQL 2005 and I'm trying to debug a stored proc (written by a far more experienced programmer which is why I'm appending here.)
At the top of the proc is the statement 'DECLARE @BillActualRoom bit'. If I understand correctly this is a local variable.
Later in the code we have the statement
'SELECT @BillActualRoom = 0 FROM BillingOptions WHERE CenterID = @CenterID'
where @CenterID is an input parameter.
The table BillingOptions does have a field called 'BillActualRoom' and it is a bit.
My question is this: Does this SQL statement make any sense at all? (My gut reaction is no but I'd like a second opinion. Can't get any consensus in the office.)
I would think that putting a local variable in like this would mean that @BillActualRoom is always equal to 0.
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Feb 27, 2004
We are trying to restrict developer permissions in our development environment. One thought is to add developers to db_datareader, db_datawriter, db_ddladmin, db_securityadmin and then revoke various permissions from ddladmin and securityadmin. The goal is to allow developer to create stored procedures and assign permissions to the stored procedures.
Another option is to place all developers in the same role and ask them to create all procedures using that role name (ex: dev_role.sp_procedurename). By doing this each developer will be able to run stored procedures created by another developer. The down side is the permissions do not match Model Office/User Test and Production.
Any suggestions on how to handle this situation?
Thanks, Dave
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Jul 30, 2007
Hi,
I was having a conversation with another developer about the order that the join conditions are placed. More specifically, about the order the tables are referenced in the join condition. There are two ways to do it, for example:-- Here the table that is referenced first was "declared" first.
SELECT*
FROM
Logon
LEFT OUTER JOIN
Thread
ON Logon.LogonID = Thread.LogonID
LEFT OUTER JOIN
Message
ON Thread.ThreadID = Message.ThreadID
-- Here the table that is referenced first is the table being joined directly above it.
SELECT*
FROM
Logon
LEFT OUTER JOIN
Thread
ON Thread.LogonID = Logon.LogonID
LEFT OUTER JOIN
Message
ON Message.ThreadID = Thread.ThreadID
I realize this is not that big of a deal, but I was wondering if anyone had a good/valid reason for doing one versus the other.
Just curious,
-Ryan
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Jul 20, 2005
i've a database where relations are hold in a special way which the projectleaders think of as "performant and uncomplicated" but which is veryquestionable to me:------------------------------------------------Table [Attributes]Fields [AttributeID] and [AttributeText]Table [Objects]Fields object stuff.... and [AttributeIDs] (varchar with 0-20 ids usually)in AttributeIDs there is a backslash separted list of Attribute-IDs like'3412278'so to get 20 object with a special attribute (which we need often) we doSELECT TOP 20 *FROM ObjectsINNER JOIN AttributesON (Objects.AttributeIDs LIKE ('%' + (CAST AttributeID AS varchar) + '\%'))ORDER BY ObjectTextps: to store data we need for communication we include a dozen of fields in*every* table and its content makes about 100 bytes/record------------------------------------------------i would do this stuff with a table to store the object/attributecorrelations.could someone tell me if that stuff makes any sense to an expert and how tovaluate it in regard of performance(we have big customers where that *is* anissue), design, scalability, pragmatism and sense ;)thanks in advance,ViperDK
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Jul 1, 2007
Dear friends,
I need your feedback, tips and opinions to improve my dataflow described in my blog.
http://pedrocgd.blogspot.com/2007/07/ssis-dataflow-performance-i.html
Thanks!!
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Apr 30, 2007
I inherited this website from a previous developer that uses an Access DB as a backend. Ugh. Apparently, he was extremely limited in what databases he could use. The website is filled with problems related to connecting to this database, which is no surprise. Most of them are related to permissions to the database file, multiple user access, etc. I am thinking about moving this to a SQL Server Express DB and upgrading the site to the 2.0 framework. Most of my experience is in SQL Server, but since they can't, or won't, pay for the SQL Server Database, is this a good solution? I've considered using MySQL as well, but their host won't provide support for this. Are there any other recommended alternatives?
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Oct 26, 2007
Hi, i need an opinion on this...to prevent the duplicate record in db,i am using unique constraints for a column or combination of column as the case may be.By reading this article http://aspalliance.com/687_Preventing_Duplicate_Record_Insertion_on_Page_Refresh.5 , i get the feeling that its not such a good idea..i am wondering,what does it imply?Does it mean that unique constraints are not reliable enough?Does it mean,it may break and let the duplicate record inserted,even though its not suppose to?I am using SQL server 2005
I have read Dino's article on dup recs and i have still not understood it completely.. i am looking for some not so complex ,full proof method,to prevent duplicate record insertion by clicking refresh or multiple (careless)clicking on submit....thanks ..
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Dec 23, 2004
I have about a 35000 record table. There are about 14 entries in this table that relate to "sections". Each of these sections can have up to 20 values. This lends itself to a design like:
big_table [one-to-one] big_table_has_sections [many-to-many] sections
or, more concretely:
BuildingConstructionType
relates to
ConstructionHasTypes
relates to
Types
Where BuildingConstructionType is one of 14 fields in the 35000 record "big" table, ConstructionHasTypes is the one-to-one intermediary relation that relates many-to-many with Types (the sections).
Unfortunately, with 35000 records, this big_table_has_sections seems like it might bloat. Is this a good solution?
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May 13, 2008
Hi Gurus,
Is there any to get time as when DBA's grated permissions on particular database...
Please advice..
This will be very helpfull to me..
Thanks,
ServerTeam
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Dec 14, 2006
Hi to everyone,My problem is, that I'm not so quite sure, which way should I go.The user is inputing by second part application a long string (let'ssay 128 characters), which are separated by semiclon.Example:A20;BU;AC40;MA50;E;E;IC;GREENNow: each from this position, is already defined in any other table, asa separate record. These are the keys lets say. It means, a have someproperities for A20, BU, aso.Because this long inputed string, is a property of device (whih alsohas a lot of different properities) I could do two different ways ofstoring data:1. By writing, in SP, just encapsulate each of the position separatedby semicolon, and write into a different table with index of device,and the position in long stirng nearly in this way:Major device data tableID AnyData1 AnyData2 ... AnyData3123 MZD12 XX77 .... any comment text124 MZD13 XY55 ... any other commentString data Tablefk_deviceId position value123 1 A20123 2 BU123 3 AC40.....123 8 GREENThe device table, contains also a pointer (position), which mightchange, to "hglight" specified position.Then, I can very easly find all necessary data. The problem is, I needto move the device record data (from other table) very often into otherhistory table (by each update). That will mean, that I also need tomove all these records from 1 -8 for example to a separate historytable, holding the index for a history device dataset. This is a littleinconvinience in this, and in my opinion, it will use to much storagedata, and by programming, I need always to shift this properities intohistory table, whith indexes to a history table of other properities.2. Table will be build nearly in this way:Major device data tableID AnyData1 AnyData2 ... AnyData3 stringProperty pointer123 MZD12 XX77 .... any comment text A20;BU;AC40;MA50;E;E;IC;GREEN 3124 MZD13 XY55 ... any other comment A20;BU;AC40;MA50;E;E;IC;GREEN 2By writng into device table, there will be just a additional field forthis string, and I will have a function, which according to specifiedpointer, will get me the string part on the fly, while I need it.This will not require the other table, and will reduce the amout ofdata, not a lot ... but always.This solution, has a inconvinance, that it will be not so fast doing asearch over the part of this strings, while there will be no real indexon this.If I woould like to search all devices, by which the curent pointervalue is equal GREEN, then I need to use function for getting thevalue, and this one will be not indexed, means, by a lot amount ofdata, might be slow.I would like to know Your opinion about booth solutions.Also, if you might point me the other problems with any of thissolution, I might not have noticed.With Best RegardsMatik
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Mar 26, 2001
In order to execute sql in Oracle, I use @sample.sql.
In SQL server, how can I execute it?
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Nov 16, 2006
I have a table that contains the following
UserName - Which is unique to each user
TimeStart - Which is the time and date that the user logs in
TimeEnd - Which is the time and date that the user logs out
Using SQL, how do you find who has logged in using the same account within the same time period. In other words, Two people are using the same username and are logged in at the same time.
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Feb 7, 2008
Give to user right connect only at night (not transaction prosessin time 9 AM-6 PM)
how to create user with this restriction?
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Aug 31, 2006
Hi, I have created a login page (webform1) that enables me to enter my user number and password and if correct it re-directs to webform 2 where all data related to the usernumber that was entered in the login page, appears. Now I want to be able to set different re-direct pages dependant upon different users as some may require more privileges then others. As for my query I have 2 types of users: staff and managers. I want to set the login page so that if staff logins in it goes webform 3 and if manager logins in it goes webform 4. My table in the Sql database is called Users & the fields are: unumber(pk), pwd, userRole, forename, surname. I have been advised to use CASE statements, yet I do not know how to use them. Below have left my code of a simple login without the userRole validation. Please help! Sub cmdLogin_ServerClick If ValidateUser(txtUserNumber.Value, txtUserPass.Value) Then Dim tkt As FormsAuthenticationTicket Dim cookiestr As String Dim ck As HttpCookie tkt = New FormsAuthenticationTicket(1, txtUserNumber.Value, DateTime.Now(), _ DateTime.Now.AddMinutes(30), chkPersistCookie.Checked, "your custom data") cookiestr = FormsAuthentication.Encrypt(tkt) ck = New HttpCookie(FormsAuthentication.FormsCookieName(), cookiestr) If (chkPersistCookie.Checked) Then ck.Expires = tkt.Expiration ck.Path = FormsAuthentication.FormsCookiePath() Response.Cookies.Add(ck) Dim strRedirect As String strRedirect = Request("ReturnURL") If strRedirect <> "" Then Response.Redirect(strRedirect, True) Else strRedirect = "webform1.aspx" Response.Redirect(strRedirect, True) End If Else Response.Redirect("webform3.aspx", True) End If End Sub
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Aug 23, 2004
Dear All,
I want my SQL database to be accessed always in a single user mode through my application. How can I do this ?
Thanks in advance.
Sushma
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