avinash jobanputra (1/30/2011)
1)We have created a number of indexes to improve the read time of some queries. However these tables then have large inserts going into them. Does indexing not slow down the insert.
Yes. Indexing is a tradeoff. Test and see what kind of hit you take on the inserts. Usually a small number of indexes is fine, but do test.
2)This specific migration is going to be running consecutively for over 24 hours. As a test I did a rebuild and reorganise half way through and this helped. Is this something valid to suggest in production.
Absolutely. You should be doing regular index maintenance. Not rebuild and reorg, the latter is redundant, but something. This script's good if the DB is large. http://sqlfool.com/2010/04/index-defrag-script-v4-0/
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability