Performance Tunning
Mar 7, 2008hi,
pls help me,tel abt query tunning & performance tunning.
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Questions On Performance Tunning
Apr 8, 2008Hi,
Somebody please help me with mostly asked question on Performance Tunning Section. I have my client interview schedule for this profile.
Thanks in advance.
-- Chetan
Tunning T-SQL ??????
Apr 23, 2008Hi
I m going through tunning part and fired query on table Code having 12500 rows
SET STATISTICS IO ON
GO
SELECT COUNT(*) FROM Code
GO
SET STATISTICS IO OFF
GO
sp_spaceused Code
got results as
Table 'Code'. Scan count 1, logical reads 60, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Name: Code
rows : 12500
reserved: 7424 KB
data : 6272 KB
index_size: 1008 KB
unused : 144 KB
If we creat table from select * into table syntax and then create PK on the table then why there is difference in results of index_size?
got results as
Table 'TestCode'. Scan count 1, logical reads 394, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0.
Name: TestCode
rows : 12500
reserved: 3208 KB
data : 3136 KB
index_size: 16 KB
unused : 56 KB
here really index not playing part???
help me out
T.i.A
Tunning Problem
Aug 10, 2003Hi, Friends!
My problem is: Ms SQL 2000, Service Pack 2 (we should install Service Pack3), 1G RAM, database not so big- about 600M.
We have an application of our client running on it.After 15-20 minutes RAM reach the limit.
So what I can do in DB configuration to fix the problem without fixing SQL or stored procedures in application.
I'm new in Ms SQL, so every advance will be appreciated!!!!
Marina.
Tunning Up A SQL Database
Jan 18, 2007This started on a Monday, SQL Server is straining the Server box,
I tried checking up on all the stored procs and changes that happened the previous week onto the Database, but nothing really major, So I tried archiving most of the data that's not needed,
Took down the MDF file from 1.2 GB to 633MB, and switched off the auto growth function on the Data File and Log File,
But the Server is still hammered,
I read a few articles on using the Index Tunning Up Wizard, but still
Curious if its safe,
Can anybody suggest anything, before i make my rough changes
Index Tunning Tools
Apr 19, 2008Hi,
Is there any index tunning tools for MS SQL 2005 better than its own one?
Thanks,
Trouble Shooting And Tunning
Jun 18, 2008Dear All,
I am having the customer db and which is running since last 1995. it is having the simple customer table which record all the customer who is visiting our 4 star hotel. this table is having 19,23,499 records. i want to run before that it was running within 1 min to display result. but suddunly it was stop down. how to tune and performe to get much faster or prevent in feature..............
Tunning Indexes On A Billon Row Table
Jun 27, 2007In our environment we have a very high insert intensive OLTP table, this has 60 million rows. From some of our applications we are very rarely getting timeouts when inserting data into this table. We are expecting that this table would soon run into billion rows and continue to grow. below is the table description and indexes. What indexes should we keep/remove on this table?
Column Name Datatype computed Length Precision Scale Nullable
Col1 int no 4 10 0 no
Col2 smallint no 2 5 0 no
Col3 smallint no 2 5 0 yes
Col4 int no 4 10 0 yes
Col5 int no 4 10 0 yes
Col6 int no 4 10 0 yes
Col7 char no 10 yes
Col8 int no 4 10 0 yes
Col9 uniqueidentifier no 16 yes
Col10 datetime no 8 yes
Col11 smallint no 2 5 0 yes
Col12 varchar no 15 yes
Col13 varchar no 30 yes
Col14 varchar no 50 yes
Col15 int no 4 10 0 yes
Col16 int no 4 10 0 yes
Col17 varchar no 12 yes
Col18 smallint no 2 5 0 yes
Col19 smallint no 2 5 0 yes
Col20 int no 4 10 0 yes
Col21 bit no 1 no
Col22 int no 4 10 0 yes
Col23 bit no 1 no
Col24 bit no 1 no
Col25 datetime no 8 no
Col26 char no 6 yes
Col27 char no 6 yes
Col28 smallint no 2 5 0 yes
Col29 char no 2 yes
Col30 int no 4 10 0 yes
Col31 smallint no 2 5 0 yes
Col32 smallint no 2 5 0 yes
Col33 bit no 1 yes
Index1 nonclustered, stats no recompute located on FileGroup2 Col9, Col10, Col12
Index2 nonclustered, stats no recompute located on FileGroup2 Col9, Col12, Col11, Col10, Col4
Index3 nonclustered, stats no recompute located on FileGroup2 Col6
Index4 nonclustered, stats no recompute located on FileGroup2 Col6, Col4
Index5 nonclustered, stats no recompute located on FileGroup2 Col5, Col9
Index6 nonclustered, stats no recompute located on FileGroup2 Col4, Col9
Index7 nonclustered, stats no recompute located on FileGroup2 Col29
Index8 nonclustered, stats no recompute located on FileGroup2 Col9
Index9 nonclustered, stats no recompute located on FileGroup2 Col6, Col9
Index10 nonclustered, stats no recompute located on FileGroup2 Col7
Index11 nonclustered, stats no recompute located on FileGroup2 Col12
Index12 clustered, unique, primary key, stats no recompute located on FileGroup3 Col1
Any links to MS best practises on indexes for sqlserver 2000 appreciated.
thanks a lot in advance.
[Performance Discussion] To Schedule A Time For Mssql Command, Which Way Would Be Faster And Get A Better Performance?
Sep 12, 20041. Use mssql server agent service to take the schedule
2. Use a .NET windows service with timers to call SqlClientConnection
above, which way would be faster and get a better performance?
Extremely Poor Query Performance - Identical DBs Different Performance
Jun 23, 2006Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server with aparticular query. It would take approximately 22 seconds to return 100rows, thats about 0.22 seconds per row. Note: I ran the query in singleuser mode. So I tested the query on the Development server by taking abackup (.dmp) of the database and moving it onto the dev server. I ranthe same query and found that it ran in less than a second.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue is relatedto some external hardware issue like: disk space, memory etc. Or couldit be OS software related issues, like service packs, SQL Serverconfiguations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating system related issue.Any Ideas would help me greatly!Thanks,Brian T*** Sent via Developersdex http://www.developersdex.com ***
View 2 Replies View RelatedVery Poor Performance - Identical DBs But Different Performance
Jun 22, 2006Hello Everyone,I have a very complex performance issue with our production database.Here's the scenario. We have a production webserver server and adevelopment web server. Both are running SQL Server 2000.I encounted various performance issues with the production server witha particular query. It would take approximately 22 seconds to return100 rows, thats about 0.22 seconds per row. Note: I ran the query insingle user mode. So I tested the query on the Development server bytaking a backup (.dmp) of the database and moving it onto the devserver. I ran the same query and found that it ran in less than asecond.I took a look at the query execution plan and I found that they we'rethe exact same in both cases.Then I took a look at the various index's, and again I found nodifferences in the table indices.If both databases are identical, I'm assumeing that the issue isrelated to some external hardware issue like: disk space, memory etc.Or could it be OS software related issues, like service packs, SQLServer configuations etc.Here's what I've done to rule out some obvious hardware issues on theprod server:1. Moved all extraneous files to a secondary harddrive to free up spaceon the primary harddrive. There is 55gb's of free space on the disk.2. Applied SQL Server SP4 service packs3. Defragmented the primary harddrive4. Applied all Windows Server 2003 updatesHere is the prod servers system specs:2x Intel Xeon 2.67GHZTotal Physical Memory 2GB, Available Physical Memory 815MBWindows Server 2003 SE /w SP1Here is the dev serers system specs:2x Intel Xeon 2.80GHz2GB DDR2-SDRAMWindows Server 2003 SE /w SP1I'm not sure what else to do, the query performance is an order ofmagnitude difference and I can't explain it. To me its is a hardware oroperating systemrelated issue.Any Ideas would help me greatly!Thanks,Brian T
View 2 Replies View RelatedPerformance...
Mar 9, 2007We have the same application installed on a few different environments with similar servers and similar hardward. The only difference is the versions of SQL and the colations.
Is SQL 2005 a lot faster that SQL 2000? Could colation type make a big effect on performance?
ScAndal
How Is The Performance Of The SQL With .Net?
Aug 31, 2007HiI want to insert 1000s of records into SQL Server 2005 Database with some manipulation. So that i put into the For Loop and inserting record.Inside the loop i am opening the connection and closing after use. The sample code is belowfor(int i=0;i<1000;i++){ sqlCmd.CommandText = "ProcName"; sqlCmd.Connection = sqlCon; sqlCmd.Connection.Open(): sqlCmd.ExecuteNonQuery(); sqlCmd.Connection.Close(); } What my Question is.. How is the Performance of this Code..?? Will is take time to get the Connection and Close the Connection in every itration?Or Shall I Open the Connection in Begining of the outside loop and close the connection at end of the Loop? will it increase the Performace?Please clarify me these question.. Thanks in advance.
View 1 Replies View RelatedSQL Performance
Dec 8, 2003I have a following problem with SQL performance:
this line 'select * from [viewUserLatestFee]' executes instantly (in Query Analiser)
this line 'select * from [viewUserLatestFee] where orgID = 1' takes up to 30 seconds for 1000 rows (still in Query analiser)
can anyone please help - I seem to have ran out of ideas
I have a feeling people might be curious about the view so here it is:
SELECT dbo.viewUserPosition.id, dbo.viewUserPosition.username, dbo.viewUserPosition.password, dbo.viewUserPosition.title,
dbo.viewUserPosition.firstName, dbo.viewUserPosition.lastName, dbo.viewUserPosition.email, dbo.viewUserPosition.address1,
dbo.viewUserPosition.address2, dbo.viewUserPosition.suburb, dbo.viewUserPosition.postcode, dbo.viewUserPosition.country,
dbo.viewUserPosition.state, dbo.viewUserPosition.mailAddress1, dbo.viewUserPosition.mailAddress2, dbo.viewUserPosition.mailSuburb,
dbo.viewUserPosition.mailPostcode, dbo.viewUserPosition.mailCountry, dbo.viewUserPosition.mailState, dbo.viewUserPosition.birthDate,
dbo.viewUserPosition.joinDate, dbo.viewUserPosition.lastUpdated, dbo.viewUserPosition.orgID, dbo.viewUserPosition.positionID,
dbo.viewLatestPaidFee.feeID, dbo.viewLatestPaidFee.mshipID, dbo.viewLatestPaidFee.name, dbo.viewLatestPaidFee.[desc],
dbo.viewLatestPaidFee.terms, dbo.viewLatestPaidFee.period, dbo.viewLatestPaidFee.periodType, dbo.viewLatestPaidFee.fee,
dbo.viewLatestPaidFee.startDate, dbo.viewLatestPaidFee.endDate, dbo.viewLatestPaidFee.deleted, dbo.viewLatestPaidFee.feePaidID,
dbo.viewLatestPaidFee.paidDate, dbo.viewLatestPaidFee.effectiveDate, dbo.viewLatestPaidFee.approved, dbo.viewLatestPaidFee.optionID,
dbo.viewLatestPaidFee.paidAmount, dbo.viewLatestPaidFee.feePaidEndDate
FROM dbo.viewUserPosition LEFT OUTER JOIN
dbo.viewLatestPaidFee ON dbo.viewUserPosition.id = dbo.viewLatestPaidFee.userID
Here is viewUserPosition:
SELECT dbo.tblUser.id, dbo.tblUser.username, dbo.tblUser.password, dbo.tblUser.title, dbo.tblUser.firstName, dbo.tblUser.lastName, dbo.tblUser.email,
dbo.tblUser.address1, dbo.tblUser.address2, dbo.tblUser.suburb, dbo.tblUser.postcode, dbo.tblUser.country, dbo.tblUser.state,
dbo.tblUser.mailAddress1, dbo.tblUser.mailAddress2, dbo.tblUser.mailSuburb, dbo.tblUser.mailPostcode, dbo.tblUser.mailCountry,
dbo.tblUser.mailState, dbo.tblUser.birthDate, dbo.tblUser.joinDate, dbo.tblUser.lastUpdated, dbo.tblRelPosition.orgID,
dbo.tblRelPosition.positionID
FROM dbo.tblUser INNER JOIN
dbo.tblRelPosition ON dbo.tblUser.id = dbo.tblRelPosition.userID
and viewLatestPaidFee:
SELECT dbo.tblMshipFee.id AS feeID, dbo.tblMshipFee.mshipID, dbo.tblMshipFee.name, dbo.tblMshipFee.[desc], dbo.tblMshipFee.terms,
dbo.tblMshipFee.period, dbo.tblMshipFee.periodType, dbo.tblMshipFee.fee, dbo.tblMshipFee.startDate, dbo.tblMshipFee.endDate,
dbo.tblMshipFee.deleted, fp.id AS feePaidID, fp.paidDate, fp.effectiveDate, fp.approved, fp.optionID, fp.paidAmount, fp.endDate AS feePaidEndDate,
fp.userID
FROM dbo.tblRelMshipFeePaid fp INNER JOIN
dbo.tblMshipFee ON dbo.tblMshipFee.id = fp.feeID AND fp.endDate =
(SELECT MAX(fp2.[endDate])
FROM [dbo].[tblRelMshipFeePaid] fp2
WHERE fp2.[userID] = fp.[userID])
SQL Performance
Jan 13, 2005We used a stored proc to pull totals from a database. Everything was fine until the table grew and started to time out. So we created a temp table to populate with a range of data and then pull the totals from there. Everything was fine until the table grew and started to time out. Any suggestion?
View 3 Replies View RelatedPerformance
Jan 17, 2002Hi,
I am newly joined as SQL DBA. I want to check the Physical disk Performance. we have RAID 5 with 5+1 disks. I calculated NO Of IO's Per Disk. But how do we know what is actual limit of IO's per disk.
Thanks
Praveen
Db Performance
May 8, 2001What's my best bet in getting better performance out of one of my database servers? Currently we have 1 set of Raid5 disks partitioned into 2 drives. This houses everything (system, database, and logs) If that server has 2 slots left for drives I was thinking of putting 2 mirrored drives and getting the logs off the main database space? (Make sense?) This is a vendored application so working with new indexes etc. isn't something I should do wo/ the vendor's interaction. Will what I describe above help?
Thanks
DTS Performance
Mar 31, 2001hi,
i am using to move data from oracle to oracle.
i have used stored procedure in oracle for the update/insert .
the dts calls the stored procedure for each record, due to this the performance has gone down. how do i increase the speed of data xfer.
has any one done any thing similar ?
Tushar
Performance
Jun 26, 2001We have SQL Server running on a dual processor Pentium 500mhz server. Our database is hit by about 300 users. 200 of those users are doing constant searches though a client table of about 250,000 records, which in turn is linked to a history table containing over 5,000,000 records. This is only the tip of the iceberg, we have many triggers, procedures, updates, etc. going in the background. The database has over 500 tables.
Keep in mind, these searches that are taking place can involve all kinds of fields: phone number, company name, fax number, first name, last name, status, wildcard searches, etc. So as you can imagine, the database is being hit with all kinds of funky requests to find records. I will be the first to admit that our developers (vendor) are not the best code writers, and we have a tough time getting them to optimize something they do not even understand themselves.
As I speak, our processor utilization is maxing out between 95 to 100 percent. I've done a lot of performance tuning and all of the problems lie in the searching. We've built, tested, rebuilt, re-tested each and every index. I even used the Profiler to filter what I could. It has improved, but our database is growing at a rate of 10 megs a day (already close to 3 gigs, not that huge). I think I've optimized my indexes as best as I can considering all the fields and possibilities available to users to search for records.
For a database that requires all of these different search criteria, what would be a more optimal server? We are looking to purchase something ASAP. I could really use help from someone in a similar situation. It seems odd, in mind, that a company of 300 people would need to rely on a quad server (four processor capability.).
Thanks. JT
Performance
May 31, 2000HI
I have 700 to 900 mb of production database , 2 gb of ram , 30 gb hard disk,
My production machine is runnng very slow , i have check everything memory,
page/sec, catch hit ratin , dbcc dbreindex but still it performance is not up to the mark.
If i stop SQL SERVER & restart for few days machine works fine but after that
again same thing it work very slow, what could be the reason
if any one had any solution please suggest.
Thanks
Nil
Performance.....Help Me !!!!!
Jan 17, 2000Hi friends,
My company has aution web site, it is written in Java and all sql statements generated dynamically. No stored procedures used. If 30 users uses this site it is OK but if around 300 users uses then the site becomes very slow(almost dead) and developers saying that database is the bottle neck. Please help me in this problem how can I check and overcome this problem.
Thanks
dindu
SQL Performance.
Apr 27, 2000I am running a SQL 7.0 server on a two processor machine. We are having some performance issues.
one of the processor is always above 90% utilization but the second is barely at 50%.
Will adding another processor help or are the processes locked to one processor.
The server is a dedicated sql server. nothing else is running on it.
Thanks for any info you can provide.
Pierre
MS SQL 7.0 Performance
Oct 20, 1999Hi,
What I have to do to determine which is the capacity (transactions / sec) of MS SQL Server 7.0 on a specific hardware configuration?
Thank you,
Sebastian Bologescu
SQL 7 Performance
May 5, 2001We have recently upgraded to SQL 7.0 on NT 4.0/sp6 box which has got 4 PIII 700 processors, 1GB RAM, and 70GB HDD on RAID 1 and RAID 5. We feel that the application performance is not great as expected in SS7. (The application was running in 6.5 smoothly and performance was good)
Is there any option needs to set to improve performance? Now, SS 7 using all the 4 processors and dynamically allocated memory, etc. Any thoughts greatly appreciated.
Thanks in Advance
Jaya
MS SQL Performance
Mar 14, 2002I'm running MS SQL Server on a 1.4 GHz AMD Athlon Processor with 750 MB or RAM and ample disk space. I have a table with 14 columns; 2 datetime, 8 int and the rest are varchar of various sizes less than 13.
I run a java process on another machine that connects to the database and insert records. It takes about 6 minutes to insert 100,000 records.
I run the xp performance monitor and only about 25% of the SQL Server machine's cpu is being used. I run top on the Linux box running java and I see about the same results. Neither machine is kept busy processing. Why don't I get better performance? Could my local area network be that slow? How many inserts per minutes is good performance?
Thanks for your input.
XML Performance
Jan 23, 2001Does anyone know the performance differences between returning data from SQL Server as XML vs. as a record set? We are about to dive into the For XML world full force, but we wanted to make sure that we are not heading for a performance nightmare.
Thanks for any insight on this. I'll try to look for white papers and do some testing in the meantime.
DB Performance
Feb 5, 2004I ave the following Code in my Stored procedure.
Declare Cursor for table A
WHILE @@FETCH_STATUS = 0
Get values from other function based on some business logic.
INSERT Into another table B
(or)
UPDATE to another table B
END
I have to insert/update values to table B, one by one row. So, it is taking more time.
Is there any way to collect the values into a temporary storage and Insert/update or Move the values to table B.
Performance
Apr 4, 20081. where do we see the buffer cache hit ratio. can we set the buffer catche hit ratio manually.
2.In query execution plan we execute the query for performance issue.which parameters we check to take an action?
DB Performance
Apr 14, 2008I have a small doubt. If we keep our data files and log files on sepertate disks how this can improve the database performance.
View 2 Replies View RelatedPerformance
Apr 5, 2006Hello,
I build a query in SQL-server 2000 but i'm not happy with the performance, it takes about 15 minutes to execute the query (4 min INSERT and 11 min UPDATE). The table tbl_total has 3 million records and an index on Contract and Item, the table contracts has 1 million records and a key on Contract and Item.
How can I speed up this query, is it for example possible to put an index on @table (internal table)?
Thanx in advance!
DECLARE @table TABLE (Contract nvarchar(15), Item nvarchar(12), Change_date datetime)
INSERT INTO @table
SELECT TOT.Contract, TOT.Item, MAX(TOT.Change_date)
FROM tbl_total TOT
WHERE EXISTS (SELECT 'X' FROM contracts CONT
WHERE TOT.Contract = CONT.Contract
AND TOT.Item = CONT.Item)
GROUP BY TOT.Contract, TOT.Item
UPDATE contracts
SET contracts.Change_date = TT.Change_date
FROM contracts INNER JOIN @table TT On
contracts.Contract = TT.Contract AND
contracts.Item = TT.Item
Like Vs '=' Performance
Dec 4, 2006Hi
I wanted to find out which is faster in terms of performance:
e.g.
select * from orders where orderRef = '00093'
Or
select * from orders where orderRef like '00093'
I know there is a differnece if i use the wild cards % etc in the results but i wanted to find out with regards to the queries above?
SQL Performance
Jan 20, 2007For performance should we index on primary key & data in table in the same file group or different file group (same or different drive) ?
Thanks,
Andy
Performance
Aug 23, 2007i need help in gaining the performance of this query
SELECT
tblSuperClientFile.ClientRefNo,
tblReferral.RefID,
tblRail.RailDescr,
tblReferral.SuperClientVendorID,
tblVendor.VendorName AS Client,
tblReferral.AssignedVendorID,
tblReferral.ReferralDate,
tblSpikeDate.DateCompleted AS PlanRevCompleted,
tblReferral.CloseDate,
tblCloseReason.CloseReason,
tblBankruptcyInfo.BK_Filing_State,
tblBankruptcyInfo.BK_Case_Number
INTO #PlanRev
FROM FNFBSDataMart.dbo.tblSpikeDate tblSpikeDate WITH (NOLOCK)
INNER JOIN #ActiveBK
ON tblSpikeDate.MasterID = #ActiveBK.MasterID
AND tblSpikeDate.FID = 3160
AND tblSpikeDate.DateCompleted <= GetDate()-5
INNER JOIN FNFBSDataMart.dbo.tblReferral tblReferral WITH (NOLOCK)
ON tblReferral.RefID = tblSpikeDate.RefID
AND tblReferral.ReferralDate >= GetDate()-180
AND tblReferral.AssignedVendorID NOT IN (188,1721)
INNER JOIN FNFBSDataMart.dbo.tblBankruptcyInfo tblBankruptcyInfo WITH (NOLOCK)
ON tblReferral.RefID = tblBankruptcyInfo.RefID
AND #ActiveBK.bk_Case_Number = tblBankruptcyInfo.bk_Case_Number
INNER JOIN FNFBSDataMart.dbo.tblSuperClientFile tblSuperClientFile WITH (NOLOCK)
ON tblReferral.ClientFileID = tblSuperClientFile.ClientFileID
AND tblSuperClientFile.SuperClientVendorID IN (1816,125,127,1706,766,1820,137,141,144,145,1593,1808,146,990,1745,149,1215,1854,1867)
INNER JOIN FNFBSDataMart.dbo.tblRail tblRail WITH (NOLOCK)
ON tblReferral.RailID = tblRail.RailID
INNER JOIN FNFBSDataMart.dbo.tblVendor tblVendor WITH (NOLOCK)
ON tblReferral.SuperClientVendorID = tblVendor.VendorID
INNER JOIN FNFBSDataMart.dbo.tlkpState tlkpState WITH (NOLOCK)
ON tblSuperClientFile.StateID = tlkpState.StateID
AND (tblSuperClientFile.SuperClientVendorID <> 1820
OR tlkpState.Abbrev NOT IN ('AZ','AK','CA','HI','ID','NV','OR','TX','UT','WA'))
LEFT OUTER JOIN FNFBSDataMart.dbo.tblCloseReason tblCloseReason WITH (NOLOCK)
ON tblReferral.CloseReaID = tblCloseReason.CloseReaID
can anyone have a look at it and give me a feed back asap