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Stairway to SQL Server Indexes: Step 11,...
Stairway to SQL Server Indexes: Step 11, Index Fragmentation
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David Durant
David Durant
Posted Wednesday, June 01, 2011 2:49 PM
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Comments posted to this topic are about the item
Stairway to SQL Server Indexes: Step 11, Index Fragmentation
Post #1118408
obulay
obulay
Posted Friday, July 01, 2011 4:04 PM
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In an example #2 to accomodate one month of inserts into 12 months table, how do we figure out that fillfactor might be 80-84%? We insert 100/13= 8% of the data, so we would reserve 8% of the space.
Post #1135412
Nadrek
Nadrek
Posted Wednesday, February 01, 2012 2:13 PM
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No offense intended, but when I refer to "external fragmentation", I refer to fragmentation outside of SQL Server's control; even if SQL Server reports page 1's next page is 2, whose next page is 3, at the OS level, perhaps they're on three completely different areas of the disk. Perhaps even the OS level is contiguous, but the SAN (Meta)LUN actually has each on noncontiguous areas of the platters.
In either case, the head has to move more than it should to read three pages.
Post #1245333
pkrudysz
pkrudysz
Posted Thursday, February 09, 2012 10:04 AM
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What would a treshold (in the number of index pages), below which we should not worry about fragmentation and don't have to rebuild?
Post #1249825
pkrudysz
pkrudysz
Posted Thursday, February 09, 2012 2:06 PM
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?
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