What is the fragmentation of the clustered index?

What is the fragmentation of the clustered index?

This generates a fragmentation of this clustered index of more than 99% (with default Fill factor).. Or with other fill factors I tested: – Setting a Fill factor of 80 on the clustered index (Fragmentation > 98%) – Setting a Fill factor of 50 on the clustered index (Fragmentation > 94%)

What happens when you delete a clustered index?

This means that the average page density of the earlier portions of the clustered index will steadily decrease, leading to increasing amount of wasted disk space and buffer pool memory as I described earlier. Deletes can cause fragmentation, as long as you consider page density as part of ‘fragmentation.’

Can a clustered index on an auto incrementing key get fragmented?

Can somebody explain how a clustered index on a auto incrementing key can get fragmented at all. I find that this is one of the most mis-understood concepts in SQL Server. The belief is that because you have an auto-incrementing key, you will never have fragmentation in the clustered index.

What is the fragmentation rate after adding 2000 rows?

After inserting 2000 rows the fragmentation is at around 4%. However, each records will be updated at least 3 times afterwards. This generates a fragmentation of this clustered index of more than 99% (with default Fill factor)..

What to do about excessive fragmentation in SQL?

These are the ones where severe index fragmentation can make the situation much worse and for this limited list of indexes, you can consider a bespoke index maintenance strategy, including setting a lower fill factor value for the index.

When does fill factor not apply to LOB data?

When you have LOB data that is not stored in-row, fill factor settings don’t apply to those pages. It also doesn’t apply to a heap: only when it is transformed into a table with a clustered index.