performance when version is upgraded..

when an app is moved from 2k to 2k5, its performance comes to a halt..  (did a backup/restore).. what spots could the trouble be?
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25112Asked:
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25112Author Commented:
especially for sp, is this related to if the parameters are set vs passed in?
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jogosCommented:
actions on upgrade
- set db to compatiblity-level 90 (sql2005)
- reindex
- update statistics

And there could be other things when new 2K5 instance
- other configuration of memory/disks/tempdb
- full recovery model and not yet a transactionlog backup running
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25112Author Commented:
it is already on 90.

glad you mentioned something about the backups.. it is goofy.. we are automatically taking tlb but not full backups.. but i put on simple .. (we were able to afford that) that did not fix it either..

i ran sp_updatestats  and that has fixed it..

so what is the lesson? after every restore, run sp_updatestats? is it only when you are going up a version or even within same version?
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Anthony PerkinsCommented:
so what is the lesson? after every restore, run sp_updatestats?
Yes.
is it only when you are going up a version or even within same version?
Regradless of the version.
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25112Author Commented:
thank you.
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Microsoft SQL Server 2005

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