Tagged Questions

2
votes
1answer
56 views

Validate Primary Key and Index Selection

I have a table that will store transaction data from store sales registers, I have read quite a bit on index and key choice and below is what I have concluded is the best option but I am new to this ...
1
vote
1answer
74 views

Consolidating indexes

I have one big table that is used to generate business intelligence cube. Currently it has around 40M rows and 55 columns. A lot of the cube dimensions are generated by running 'select distinct' on a ...
7
votes
2answers
173 views

Different results rebuilding an index online and offline

I have a non-clustered, non-unique index on a foreign key column of type bigint. When I rebuild the index online, the average fragmentation drops to 3%, with 2 fragments, and 30 pages. When I run ...
2
votes
1answer
112 views

Does rowlocks on index cause keylocks? : Transaction (Process ID xy) was deadlocked, example included

I am currently experiencing the error (logged via traceID 1222 ): keylock hobtid= 8205698989 objectname=mydb.dbo.Orders indexname = _dta_Index_Orders_5_120345_K1_K2_7_1 id=lock43fe181 mode=S ...
1
vote
1answer
61 views

Possible to query all SQL Server Indexes which have page locks enabled?

Is it possible to run a SQL Server Query in order to view all SQL Server Indexes which have page locks enabled?
2
votes
2answers
155 views

Defrag a HEAP by creating clustered index and immediately dropping it

I'm writing a script which intends to defrag a HEAP based table by creating a dummy col with a clustered index and then immediately dropping it. (It's someone else's app and I don't want to make any ...
2
votes
1answer
124 views

clustered and covering index ignored on delete statement. Table scan occurs

Why would SQL Server 2005 find it more efficient to perform a table scan instead of using the available clustered index on the primary key (and only the primary key)? DISCLAIMER: There is also a ...
5
votes
3answers
281 views

Query performance degrades with time and use

I have been fighting a problem for several weeks now where the performance of my SQL Server queries degrade over a few days of use. In addition every few days, a query will simply not return from my ...
4
votes
2answers
247 views

Why index REBUILD does not reduce index fragmentatation with a page count > 1000?

This is kind of a followup to the existing question on this site "Why index REBUILD does not reduce index fragmentatation?". The accepted answer to that question, and all other resources I have found ...
5
votes
3answers
374 views

Does having an index on a VARCHAR column with a lot of very similar starting values have bad performance

We seem to be having quite unusual bad performance on queries that use an index. for example the table looks like PK BIGINT ID VARCHAR(50) Col1 Col2 etc So we need to insert a row in the ...
4
votes
4answers
184 views

Can I reorganise index on a sql server 2005 database without performance hit on production server

I would have preferred to run online index rebuild instead but our production sql server (2005) is standard edition. Hence I think I am left with reorganising index and update statistics after that. ...
5
votes
2answers
122 views

Unique Contraint/Index Based On Values

I have a table that has the following column definitions: ID (INT, PK) Name (VarChar) Active (Bit) Bunch_of (Other_columns) Question: I want to have a Constraint on Name/Active such that we can ...
4
votes
1answer
275 views

Index defrag takes forever to run

We have an Agent job that runs every morning at 2a.m. to defrag the top 5 biggest tables. Usually it takes around 20 mins to complete. It has stayed this way for several years. However, recently (last ...
0
votes
2answers
115 views

How to move all non-unique and non-clustered indexes to a different filegroup?

I want to move all indexes to a separate hard drive. To that effect, I created a new filegroup, then added a new file to it (e.g. alter database foo add file(...) to FileGroup). Now I want to move ...
2
votes
1answer
519 views

Is Index causing timeouts?

Recently, while fine tuning the db for better perf, I changed a couple of indexes on tables which were hit very often. I am using the following query to keep tab on index stats SELECT DISTINCT ...

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