Please start any new threads on our new
site at https://forums.sqlteam.com. We've got lots of great SQL Server
experts to answer whatever question you can come up with.
| Author |
Topic |
|
sona
Yak Posting Veteran
68 Posts |
 Posted - 2003-03-26 : 00:34:00
|
| I want to rebuild my index in my live database with more than 100 transactions per minute.Will this cause any performance impact in the live database |
|
|
franco
Constraint Violating Yak Guru
255 Posts |
Posted - 2003-03-26 : 02:00:47
|
From BOL:Unlike DBCC DBREINDEX or any general index build, DBCC INDEXDEFRAG is an online operation, so it does not hold long-term locks that can block running queries or updates. Depending on the amount of fragmentation, DBCC INDEXDEFRAG can be considerably faster than running DBCC DBREINDEX because a relatively unfragmented index can be defragmented much faster than a new index can be built. Another advantage is that with DBCC INDEXDEFRAG, the index is always available, unlike DBREINDEX. A large amount of fragmentation can cause DBCC INDEXDEFRAG to run considerably longer than DBCC DBREINDEX, which may or may not outweigh the benefit of the command's online capabilities. DBCC INDEXDEFRAG will not help if two indexes are interleaved on the disk because INDEXDEFRAG shuffles the pages in place. To improve the clustering of pages, rebuild the index.HTH   Franco |
 |
|
|
|
|
|
rebuilding index