Tagged Questions

2
votes
0answers
80 views

Why does CREATE INDEX … WITH ONLINE=ON block access to the table over a period of minutes?

I have an existing table: CREATE TABLE dbo.ProofDetails ( ProofDetailsID int NOT NULL CONSTRAINT PK_ProofDetails PRIMARY KEY CLUSTERED IDENTITY(1,1), ProofID int NULL, ...
1
vote
1answer
55 views

Suspended in index rebuild

In SQL Server 2012, an Index Rebuild job is taking a very long time (up to 8 hours). However, not even one Index rebuild completed, so I stopped the index job. In monitoring SQL task: state = ...
0
votes
3answers
85 views

SQL Server 2012, rebuild not lowering avg fragmentation

I have a script identifying what indices to rebuild. select 'alter index ' + name + ' on ' + @dbname + '.dbo.' + OBJECT_NAME(a.object_id) + ' rebuild;' from sys.dm_db_index_physical_stats ...
1
vote
0answers
85 views

Best Practice to update columnstore indexed tables

I have a table with aprox. 22 Bn rows, for each month I have made one partition that and each partition has two data files. I created the columnstore index on this table and the performance ...
6
votes
1answer
95 views

Ok to drop indexes on FK's if they have no stats in the DMVS

I have used the well known query below from Kevin Kline to check for unused indexes. Several indexes created on Foreign keys returns no read stats, only writes. Are you 100% safe to drop these ...
1
vote
1answer
295 views

SQL Server Full-Text Indexer with stoplists/stopwords

As I'm working on a graduate project (Textmining with SQL Server 2012 Semantic Search) I run into a situation where I need to post a question on this website, hoping someone can help me. This ...
2
votes
1answer
157 views

Why 2 allocation units during online index rebuild to different file group?

I'm in the process of rebuilding the clustered index of a big table to a different file group. I'm monitoring the rebuild process using sys.system_internals_allocation_units. I'm 3h in but not done ...
3
votes
1answer
197 views

Move Primary Key to Filegroup (SQL Server 2012)

How can I move a clustered primary key to a new filegroup? I already have found a possible "algorithm" but it is horribly inefficient: Drop non-clustered indexed (requires them to be resorted and ...
2
votes
2answers
127 views

SQL Server and Over-Indexing Tables [duplicate]

Possible Duplicate: Where can I find some guidance on index strategies? I remember taking a course on SQL Server 2000, and the instructor said that you have to be careful of adding too many ...
3
votes
2answers
280 views

SQL Server 2012 - Frequent SELECT and UPDATE on bit column. Index doesn't help

I have a SQL Server table with about 2 million rows in, this table stores short textual documents. Here's my schema: CREATE TABLE Documents ( documentId bigint IDENTITY NOT NULL, content ...
9
votes
1answer
685 views

What's the anatomy of a columnstore index?

One of the new features in SQL Server 2012 codenamed Denali is the Columnstore index. I know a good bit about regular old row-store indexes, like the b-tree structure, differences in storage between ...