Don’t Rebuild Heaps

Steve Jones notes the issues around rebuilding tables lacking clustered indexes:

What about adding a clustered index and dropping it? Nooooooo, and again, I learned something new. This causes two rebuilds of the non-clustered indexes as they are rebuilt with the cluster addition and then rebuilt when the table changes back to a heap (to get the heap locations). That’s crazy, and certainly not what we want.

Also read Matthew Darwin’s comment, as “Don’t do X” usually has an “Except when Y” corollary.

Related Posts

Oddity With User Write Count In dm_db_index_usage_stats

Shaun J. Stuart looks at an oddity with the user_updates column on sys.dm_db_index_usage_stats: This pulls both reads and writes from the sys.dm_db_index_usage_stats dynamic management view. A read is defined as either a seek, scan, or lookup and a write is defined as an update. All seemed good until I noticed something strange. One of the top written to tables was, based on our naming convention, a […]

Read More

Safely Dropping Databases

Bob Pusateri notes a little issue when it comes to dropping databases: At a previous employer, we had a well-defined process when dropping databases for a client. It went something like this: Confirm in writing the databases on which servers/instances to be dropped Take a final full backup of databases Take databases offline Wait at […]

Read More

Categories

January 2016
MTWTFSS
« Dec Feb »
 123
45678910
11121314151617
18192021222324
25262728293031