MICROSOFT OUTLOOK REBUILD INDEX UPDATE
MICROSOFT OUTLOOK REBUILD INDEX MANUAL

Jack Li | Senior Escalation Engineer | Microsoft SQL Server Support

only the stats from the index got updated run theh following and note that the stats created by auto stats didn't get updated by rebuild Note that the last_updated for t1_indx1 has newer time stamp than _WA_Sys_00000002_162F4418 because _WA_Sys_00000002_162F4418 never got updated by alter index command.

MICROSOFT OUTLOOK REBUILD INDEX UPDATE

re-organize won't update even stats of the index JOIN sys.stats stat ON stat.object_id = obj.object_idĬROSS APPLY sys.dm_db_stats_properties(stat.object_id, stat.stats_id) AS sp Obj.name, stat.name, stat.stats_id, last_updated Here is a demo that alter index doesn’t update all stats.īecause I ran update statistics, the follow query will show that the t1_indx1 and _WA_Sys_00000002_162F4418 have the same value for laste_updated Statistical maintenance functionality (autostats) in SQL Server

MICROSOFT OUTLOOK REBUILD INDEX MANUAL

Manual updating statistics may be necessary because our current trigger threshold is high for large tables (20% in most cases as in KB “ Sometimes, non-index statistics are very critical as well. Note that non-index stats means the statistics associated with a column/columns that are automatically created or manually created.Īs you can see from above, don’t assume all of your statistics get updated just because you have a maintenance plan to rebuild index. Yes, stats for all indexes will be updated Yes but only for stats associated with that index In order to illustrate this better, let’s draw a table When you use alter index rebuild, only statistics associated with that index will be updated. You may be surprised to know that index rebuild doesn’t update all statistics. If someone asks you the question “Does rebuild index update statistics?”, you probably will say “of course”. I thought I’d share a few and wanted to start with index rebuild. Quite a few facts ended up surprising the audience. I recently did a talk to a group of SQL users.

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