Sorry for the late reply.
Thanks of your valid suggestions and help !!
Is there any impact to database if we do the index rebuild simultaneously/parellely except the performance issue means database goes to suspect mode or...?please
Please advise me on this.
Thanks and Regards,
1) Unless you are on the Enterprise Edition and use the ONLINE option, rebuiding an index will exclusively lock that table and prevent ANY access to it while the index is being rebuilt. So you can completely shut down your application if you rebuild important tables.
2) assuming your IO is on the same spindles for these tables then yes you can seriously affect IO throughput with index maintenance. They can also hammer CPU usage as well.
Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru at GMail