SQL Server 2008 :: Does List Of Page IDs Allocated For A Table Change During Index Rebuilds
Jul 16, 2015
We noticed a deadlock 3-4 weeks ago on a table (table1) and deadlock graph was captured.
When I am analyzing the deadlock graph, page number using DBCC PAGE, I am getting the object id for a different table (table2). But deadlock graph shows the name of the object as table1.
Is it possible that subsequent defragmentation of indexes would have caused the respective page id to got re-allocated to a different table? I checked the deadlock graph lately only after 3-4 weeks.
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Jul 9, 2015
I have a situation where I need to rebuild indexes on a large DB (500G).
When I do a test run of the rebuilds in my test environment it uses 100G of space - which is fine with me.
When I do a rebuild in my High Availability environment - same DB, same script - it eats up over 600G of space and fills the volume.
What can I do without removing my DB from H/A to rebuild the indexes?
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Apr 2, 2015
I am trying to print Companies with less than 100 employees for all dates.Here's my table structure
Create table CompanyEmployeeArchive(
Company varchar(100) not null, Employees int, Dateinserted date)
Insert into CompanyEmployeeArchive values('Microsoft',1001,'2015-01-01')
Insert into CompanyEmployeeArchive values('Microsoft',1050,'2015-02-01')
Insert into CompanyEmployeeArchive values('Microsoft',1600,'2015-03-01')
Insert into CompanyEmployeeArchive values('IBM',10,'2015-01-01')
Insert into CompanyEmployeeArchive values('IBM',80,'2015-02-01')
Insert into CompanyEmployeeArchive values('Apple',90,'2015-01-01')
Insert into CompanyEmployeeArchive values('Apple',900,'2015-02-01')
Insert into CompanyEmployeeArchive values('Apple',1000,'2015-03-01')
I want companies that have employees less than 100 for all dates i.e. Only IBM. Apple has < 100 employees only on one month.Select Company, dateinserted, employees from CompanyEmployeeArchive group by company,dateinserted,employees having employees < 100 order by company, dateinserted this query lists Apple too. How can I change the query so Apple does not show up in the list.
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Oct 23, 2001
HELP! In SQL Server 2k, how can a test be run against a table to verify that a "create index with drop_existing" successfully rebuilt the table's clustered index and any nonclustered indexes? This test should ensure the statement didn't complete without actually performing any changes.
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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 10, 2015
I have been trying to convert an existing table that used adjacency list model (parentid,childid) to a table that use hierarchy Id type. So early on, I notice my original data does contains multiple roots. So I took a step to create dummy nodes to ensure all nodes fall into a single root structure. Another important fact is that each child node can have multiple parents.
My original source table contains 22461 records, when running the query below step 2 produces explosive number of records around 175,000+ records. I spent hours study the result and couldn't understand what actually causing this, I ran it against small set of test data I didn't seem the issue caused by child with multiple parents.
select * from SourceTable -- produces 22461 records
--step 1: first, get row number of child records in each parent
SELECT ChildID,ParentID, ROW_NUMBER() OVER (PARTITION BY PARENTID ORDER BY PARENTID) as Num
INTO #RelationshipTmp
FROM SourceTable;
[Code] ....
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Jun 8, 2015
best way to track changes for a very pesky table.We pull down a table from an Oracle database (via linked server) into our SQL Server on a daily basis. The data in this table is just truncated and reloaded daily. There is no "history" kept in the oracle database and values are not being "updated" its just dropped and repopulated.
So, I have toyed around with CDC and even creating my own custom auditing method but I can't come up with a reasonable solution that doesn't involve a massive audit table that doesn't provide much useful info.
For example, there are two date fields in the table that my customer wishes to have history tracked for. Every day, this table is truncated and reloaded - however those dates may stay the same for many many many months. If I turn on CDC, I will get tons of audit records for a delete and an insert every day but the values for the two date fields may not have even changed.
The table has tons of fields in it but I only care about the 2 date fields for history purposes.Here is a snippet of the table (I took out all the additional fields in the table and just left the two date fields that need to be tracked):
CREATE TABLE [dbo].[Fake_Name](
[lin] [char](6) NOT NULL,
[boip_no] [char](6) NOT NULL,
[dt_tc] [varchar](25) NULL,
[Code] .....
method to track changes to this table with it being truncated every day?
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Oct 30, 2015
Give a user table ‘MyTable’. How to know whether the table contains a non-unique clustered index by using SQL query?
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Apr 22, 2015
What is the best way to forecastestimate space for non-clustered index on a table?
Example :
Table name : Test123
Row : 170000000
Reserved : 18000000 KB
Data : 70000000 KB
Index: 40000000 KB
Note: Test123 already has clustered index and 2 non clustered indexes.
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Jan 13, 2013
Or can it record before and after column changes based on the LSN only?
An extract from a file based legacy accounting system is performed every night. The system does not have a primary key because transactions are managed through program code. (the more things change...). The extract is copied to text in Unix and FTP'd to Windows, where the file is loaded into SQL Server by kill & fill. Because of the expense of modifying the source system, there is enormous inertia/resistance to injecting a primary key at the source, so kill & fill it stays.
In reading about Change Data Capture, it seemed to me that column level insert update and delete are stored in tables that remember the before and after content of each column tracked. In my reading I have seen many references to the LSN to decide when and what to record as changed, but I have not seen any refereference to the necessity of a primary key for Change Data Capture to work. This is in contrast to replication, where the requirement for the existence of a primary key is made plain.
Is it possible to use Change Data Capture against a table without a primary key? How to use it to change the extract from kill and fill to incremental.
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Jul 23, 2005
I've just found a blocking lock occuring in a SQL Server.[color=blue]>From the waitresource, I found that the blocker has the following[/color]information:wait_info: PAGEIOLATCH_EXwait_resource: 14:1:564312And the blockee has the following information:wait_info: LCK_M_Swait_resource: KEY: 14:405576483:2 (7501a5aa8355)The problem is that I do not know which object is the blocker holding,for I understand that for a PAGE lock, it is in the format ofdatabase_id:file_id:page_idI know the db_id, the file_id but don't know how to map the page_id(564312) to a table/index in the database.Can somebody shed some lights on this? thks a lot.
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Jul 20, 2005
Hello,I not exactly sure how to determine the table when given the followinginformation:--Could not find the index for RID '999999' in index page('1:99999999'), index id ), database (whatever).--Can you someone tell how I use the system tables to determine whattable this index corresponds to? I'm assuming I used sysindexes andsysobjects somehow.Thanks in advance,JGB_DBA
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Mar 14, 2014
How to create a script to input one table name(already indexed) to get list of all index for that table?
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Sep 30, 2015
I have list (in an input file) where each row is about 20K in size (so it can't be stored in a sql table). I want to convert the list into a table as shown below:
before:
---------------
pk1, c1, d1, c2, d2, c3, d3,......
pk2 c1,d1,c2,d2,c3,d3.....
where "pk" denotes a primary key and in a given row (c1,c2.c3,...) are all distinct. ("c" are columns names, "d" is the associated data)
after: (desired conversion)
---------------
pk1,c1,d1
pk1,c2,d2
pk1,c3,d3
...
pk2,c1,d1
pk2,c2,d2
pk2,c3,d3
....
I was planning to have SSIS pull in the "before" data, run a custom C# program in SSIS against it to massage the data to vertical (3-column format), then export the massaged data to a new text file. The new text file would later be imported into a sql table using SSIS.
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Jul 30, 2015
write a query that lists item, mfg serial number, and inspection date. The caveat is that, where there is more than one record for an item, he only wants item listed once. For example:
PartNumberInspectionDateManufacturerSerialNumber
1A144878/4/2013.1101VAS073-7
3L115931/28/2014009VAS206-1
1/29/2014009VAS206-1
2/21/2014009VAS206-1
7/22/2014009VAS206-1
2A285631/1/2015010115ND9CV02
1A203921/3/2015010315ND9PV45
1/4/2015010315ND9PV45
3/1/2015010315ND9PV45
2A2794310/20/20120103700P003
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Jun 12, 2015
I want to import xml file directly from web page into microsoft sql table. At the moment the import is done after the XML file is downloaded local.I want to skip this step to manualy download the file.It can be done in SQL? when i change the path i get this error: Cannot bulk load because the file URL... could not be opened. Operating system error code 123(The filename, directory name, or volume label syntax is incorrect.)
below is the code
DECLARE @idoc INT
DECLARE @doc XML
SET @Doc = (SELECT * FROM OPENROWSET(BULK 'F:Folderbrfxrates.xml', SINGLE_CLOB) AS xmlData) -- 1 LOCAL works
--SET @Doc = (SELECT * FROM OPENROWSET(BULK 'http://www.bnr.ro/nbrfxrates.xml', SINGLE_CLOB) AS xmlData) -- from web i get error
SELECT @Doc
[code]...
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Jun 21, 2007
I've been using full-text for quite some time, but I switched to another product for quite some time. The reason is that microsoft full-text doesn't offer the feature where one can get a resultset of page x out of y pages, i.e: give me top 100 matches of page 125 out of 5000 pages. I disappointedly waited for SQL Server 2005 and now it doesn't seem to support in sql server 2008 full-text search either. I had to get all 5000 pages of data, then jumped to page 125 to get just 100 records of that page--had to go get a coffee and came back for a 2+ millions rows table. Customers want the result in a split of a second.
Anyone knows if the final version of sql server 2008 will have better support for paging and getting top x rows? I scanned through 2008 BOL and didn't see any change from sql server 2005 or even sql server 2000 full-text search. (one improvement in sql server 2005 over sql server 2000 was the speed of populating large catalog and multiple languages support)
Thanks,
HH
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May 18, 2008
Hi,
I am working on a script to do following:
get a list of indexes on all tables in all dbs on a SQL server.
If the index property to allow page locks is off, then turn it on, re-index and turn it off again.
My problem is:
i want to use ' Use <db>' statement in the middle of my script but it is not working.I tried using dynamic SQL with
set @cmd='use '+ @dbname
exec (@cmd)
But this is not working.
Can we use 'use' statement in the middle of a script? If not what is the alternative?
My script looks as follows:
DECLARE @Database VARCHAR(255)
DECLARE @Table VARCHAR(255)
declare @Index varchar(255)
DECLARE @cmd NVARCHAR(500)
DECLARE @fillfactor INT
SET @fillfactor = 90
DECLARE DatabaseCursor CURSOR FOR
SELECT name FROM master.dbo.sysdatabases
WHERE name NOT IN ('master','model','msdb','tempdb','distrbution')
ORDER BY 1
OPEN DatabaseCursor
FETCH NEXT FROM DatabaseCursor INTO @Database
WHILE @@FETCH_STATUS = 0
BEGIN
SET @cmd = 'DECLARE TableCursor CURSOR FOR SELECT table_catalog + ''.'' + table_schema + ''.'' + table_name as tableName
FROM ' + @Database + '.INFORMATION_SCHEMA.TABLES WHERE table_type = ''BASE TABLE'''
-- create table cursor
EXEC (@cmd)
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @Table
WHILE @@FETCH_STATUS = 0
BEGIN
set @cmd='use '+@Database
print (@cmd)
exec (@cmd)
declare IndexCursor CURSOR for select name from sys.indexes where object_id=object_id(@Table)
open IndexCursor
fetch next from IndexCursor into @Index
print (@table)
--select name from sys.indexes where object_id=object_id(@Table)
print (@index)
WHILE @@FETCH_STATUS = 0
begin
if (INDEXPROPERTY(OBJECT_ID(@Table),@Index,'IsPageLockDisallowed')=1)
begin
print (@Index + ' page locking off')
-- SET @cmd='ALTER INDEX '+@Index +' ON '+@Table+' SET (ALLOW_PAGE_LOCKS = ON) reorganize
-- ALTER INDEX '+@Index +' ON '+@Table+' SET (ALLOW_PAGE_LOCKS = OFF)'
end
else
begin
print (@Index + ' page locking on')
-- SET @cmd='ALTER INDEX '+@Index +' ON '+@Table+' reorganize'
end
--PRINT (@cmd)
fetch next from IndexCursor into @Index
end
CLOSE IndexCursor
DEALLOCATE IndexCursor
FETCH NEXT FROM TableCursor INTO @Table
END
CLOSE TableCursor
DEALLOCATE TableCursor
FETCH NEXT FROM DatabaseCursor INTO @Database
END
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor
Can anyone help me please?
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Jul 27, 2015
who i can to list the content of all store procedures and funtions in text file ?
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Sep 24, 2015
I have a table which has cluster index on col1 column. If i insert 10 into my table what would be cluster index key value?Is it going to be 10 as well? How do i get cluster index key value?
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May 11, 2015
I am working now on optimization of an update query for a particular table and I want to measure the number of page splits after each update. How to check it?
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Jul 28, 2015
I created a thread 2 days back on a performance problem RE non-trusted check constraints and foreign key constraints. We are planning to make them trusted to see if it works. On the other hand, we see about 50+ clustered/non-clustered indexes with >90% fragmentation but the page counts for all these indexes are in the range between 500-900. I'm reading in the whitepaper that index fragmentation with less than 1000 pages is not a concern.
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Oct 16, 2015
I have moved some DB's from a physical server to a virtual server while the physical server is being upgraded. This morning when I checked to make sure all the jobs are running fine I saw that a backup job failed for one of the databases. The error was :
[color=#ff0000]Executed as user: NT AUTHORITYSYSTEM. BACKUP 'database 1' detected an error on page (1:1400911) in file 'D:Datadatabase 1.mdf'. [SQLSTATE 42000] (Error 3043) BACKUP DATABASE is terminating abnormally. [SQLSTATE 42000] (Error 3013). The step failed.[/color]
Then I ran a DBCC check db command and found the following errors:
Msg 8928, Level 16, State 1, Line 1
Msg 8939, Level 16, State 98, Line 1
Msg 8976, Level 16, State 1, Line 1
Msg 8978, Level 16, State 1, Line 1
Msg 8939, Level 16, State 98, Line 1
Msg 8978, Level 16, State 1, Line 1
The messages varies from data from one page cannot be referenced on another, data page cannot be processed, page was not seen in the scan although the parent was etc etc.
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Mar 12, 2015
How do I filter a list of Employees where the Sum of "VALIDATED" hours is less than 80? For example.
Here is the flat table
SELECT EMP_NO, hours, IsValidated, rate_type
FROM Pay_Records
WHERE pay_period_id = 2
Order by EMP_NO
Output will be something like this
12345 | 2 |true |REG
12345 | 15 |false |OVR
12345 | 30 |true |OVER
33334 |2| true |REG
Total Validated hours for the Employee 12345 will be 32 NOT 47. How do I list employees who worked less than 80 validated hours. The hours are validated only when it is true.
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Apr 6, 2015
I written a proc to display the list of Indexes But I needed to print the database where the objects do belong to. How I should write the Dynamic script to add the database Id? I thought to use derived table kind of stuff, but unable to find a solution.
ALTER PROC [dbo].[USP_INDEXCHECK]
AS
DECLARE @sql NVARCHAR(max)
DECLARE @DB VARCHAR(max)
DECLARE databasecursor CURSOR FOR
[Code] .....
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Apr 8, 2015
i was trying to use the XML read functionality using t-SQL for XML attached.The column is coming with the token names and token-values in XML format and we are using the XML nodes() functionality to read the token names and token value.I am able to read only the parent token names and its values(using the sql attached) and could not be able to get the child token names and its values.how can i acheive the tokenNames with its values with the SQL query.i am attaching both SQL script which i am using and the XML entity.
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May 6, 2015
Looking at an execution plan today I noticed something I've not seen before. The plan includes a non clustered index seek, followed by a RID lookup on the heap. The output list for the index seek contains the expected "Bmk" column (in this case "Bmk1473"), but also includes "IsBaseRow1475". This isn't a column from the table.
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Feb 27, 2015
After reading some comments here I decided to look at tables to see if any had a clustered index that was a unique identifier. Yep. So if I have a table with a unique identifier as the primary key/clustered index and an identity column that is indexed, I would like to make the identity a clustered index (maybe even the primary key) and make the unique identifier a unique non-clustered index (not the primary key).
Does this sound reasonable?If I do this will I need to drop and recreate the other indexes? Or maybe just rebuild the other indexes?
Currently:
CREATE TABLE Payments (
IDX INT IDENTITY(1,1) NOT NULL,
GUID UNIQUEIDENTIFIER NOT NULL DEFAULT(NEWID()),
.....
-- many other columns
);
GO
ALTER TABLE [dbo].[PAYMENTS] ADD CONSTRAINT [PK_PAYMENTS_GID] PRIMARY KEY CLUSTERED ([GUID] ASC);
GO
CREATE NONCLUSTERED INDEX [IX_Payments_ID] ON [dbo].[PAYMENTS] ([IDX] ASC);
GO
Would like:
ALTER TABLE [dbo].[PAYMENTS] ADD CONSTRAINT [PK_PAYMENTS_IDX] PRIMARY KEY CLUSTERED (IDX ASC);
GO
CREATE UNIQUE NONCLUSTERED INDEX [IX_Payments_GUID] ON [dbo].[PAYMENTS] (GUID ASC);
GO
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Apr 1, 2015
I've yet to use partitioning in a production environment, and pretty much last ran any partitioning related code a few years back when looking at certification; so I'm definitely not an expert on the matter and only loosely clued up on the concepts.
I've recently started with a new employer, and they have just implemented a new system for sms messaging. The database tables tracking the sms messages being sent are going to get big and so they have created decided to implement partitioning on some of the tables using a partition scheme on the CreatedDate column; the DBA involved in designing the partitioning has left and I'm picking this up.
The relevant DDL for the table is below:-
CREATE TABLE [Message].[Sms](
[SmsId] [bigint] IDENTITY(250000001,1) NOT NULL,
[CreatedDate] [datetime] NOT NULL CONSTRAINT [DF_Sms:CreatedDate] DEFAULT (getdate()),
CONSTRAINT [PK_Sms:SmsId] PRIMARY KEY NONCLUSTERED
[code]....
There are some issues with the above that I will be addressing seperately (e.g. the clustered index should be unique as it contians the unique key, and the fillfactors are daft), but my concerns for this post are below.
1) How to define the Primary Key and enforce it's uniqueness whilst trying to ensure it's aligned with the partition in order to be able to switch out old data once an as yet undefined retention period has passed. In books online it states:- "If it is not possible for the partitioning column to be included in the unique key, you must use a DML trigger instead to enforce uniqueness. " Books online - Special Guidelines for Partitioned Indexes. However, I'm not sure what this means, nor how I create the primary key to use the partition function seeing as it doesn't have the CreatedDate in the unique key?
2) The original partition function was envisaged as the following:-
CREATE PARTITION FUNCTION [DateFunction](datetime) AS RANGE
LEFT FOR VALUES (N'2014-01-01T00:00:00.000'
, N'2014-04-01T00:00:00.000'
, N'2014-07-01T00:00:00.000'
, N'2014-10-01T00:00:00.000'
, N'2015-01-01T00:00:00.000'
, N'2015-04-01T00:00:00.000'
, N'2015-04-02T00:00:00.000'
, N'2015-04-03T00:00:00.000'
, N'2015-04-04T00:00:00.000'
, N'2015-04-05T00:00:00.000')
GO
There is a procedure that has been created and scheduled daily that will create a new partition for each day, and then merge these together at the end of the quarter. My understanding of partitioning is that this is a bad idea, as it will result in merging several populated partitions together. Is my understanding correct? If so, I'm planning on removing the day partitions at the end of the function, and simply adding quarterly partitions, maintaining a spare empty partition at the end of the table. Would this make more sense?
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Apr 8, 2015
I just did index defragmentation for some databases include MSDB . I notice there are 3 indexes from MSDB database that fragmented quickly ( I did rebuild last nite at 10 PM - > fragmentation level becomes zero but today at 9 am it become 80 % ).The indexes are backupsetuuid, backup media family uuid, backupmediasetuuid. I am thinking to set the fill factor for those indexes = 80 respectively.
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Jul 1, 2015
We are adding 4-5 indexes to one database and dropping 2 unused indexes. I don't have proper testing environment. How to monitor these indexes changes? Do we need to run any baseline but we don't get load all the time same load all the days
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Jul 3, 2015
Currently we have SQL instance on C: drive.We are now going to upgrade SQL Server 2008 RTM to SQL 2008 SP4.Can we change the path of SQL instance during upgrade?What services need to be stopped during upgrade.
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Mar 3, 2015
Is there anyway,can we find the list of servers by querying at active directory?
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