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Using update statistics can give you the granularity of control to only update the out of date statistics, thus having less impact on your production system. It is one line of code that will update all the statistics in the database using the default sample size of 20,000 rows per table.this solution only rebuilds/reorganize and updates what is needed this way you might shortenthe time your maintinance plan takes and also save a hole lot of log space.. In your original post, you said that users are seeing a performance degredation due to this maintenance plan.Is there no other time to run this maintenance plan? I see that your plan encompasses index reorganization, when are you rebuilding indexes?FULLSCAN Compute statistics by scanning all rows in the table or indexed view. The actual percentage or number of rows the query optimizer samples might not match the percentage or number specified.If you need to optimise SQL Server performance, it pays to understand SQL Server Statistics.
Exactly how often you should be updating statistics depends greatly on how much data modification your indexes and data is receiving.
Of the 23 minute Maintenance Plan, Updating the Statistics takes a staggering 13 minutes.
During this 13 minute period, access to the database is blocked (or at least, replication from this DB to our others is paused).
For more information about AUTO_CREATE_STATISTICS, see ALTER DATABASE SET Options (Transact-SQL).
To view all indexes for a table or view, you can use sp_helpindex.