1
vote
1answer
367 views

Defrag or Backup+Restore

I have an MDF file that was autogrown from 1MB to 40GB in 10% increment. The file is heavily fragmented now, and I want to defrag it with minimum downtime. I have a plan that I am not sure will work: ...
4
votes
2answers
618 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 ...
9
votes
2answers
206 views

Index fragmentation while continuously processing

SQL Server 2005 I need to be able to continuously process about 350M records in a 900M record table. The query I'm using to select the records to process becomes badly fragmented as I process and I ...
3
votes
1answer
549 views

Index fragmentation increase as more row being deleted

I have a table that contains more than 18 million records. I have a process that clears data out of that table everyday. Index fragmentation was low. This table has high transaction throughput. ...
8
votes
3answers
3k views

What's better for large changes to a table: DELETE and INSERT every time or UPDATE existing?

I am making a project where I need to change around 36K records in one table daily. I'm wondering what will perform better: delete rows and insert new ones, or update already existing rows For me ...
2
votes
1answer
619 views

Optimising a Database Shrink (in terms of speed and reducing fragmentation)

We have a large database that has had a lot of older data stripped out, leaving primary datafile (all objects are currently in the primary filegroup) of about 80Gb containing a little less than 20Gb ...