Updating index statistics sql dating for city ru
PS: Whatever the difference may be, I would not use sp_updatestats as the mechanism it uses to update stats is not good, why should i update stats for table if just one row has changed and I have 100K rows in table, it will just consume resources and cause more issue.EDIT: If you want to update stats selectively and do not want to run sp_updatestas use below query to filter out outdated stats.To do this, it checks a histogram that identifies the data distribution, and uses this information to determine join orders, index selection, and more.You might think that the server would keep this information up-to-date, but because of the resource cost, it does not.are metadata about the data within a table and they're created and updated on a column-by-column basis, not on the entire table.
Statistics are automatically updated when certain thresholds within SQL Server are met, i.e., the number of rows in the table increases or decreases by 10% of the number of rows the statistic was based on.
Once the threshold is reached, SQL Server will automatically update the statistic(s) defined in the table.
If you have a table that stays at approximately the same number of rows, but data is added and removed on a regular basis, your statistics will become out of date rather quickly.
I'm trying to get us out of the "just because" mind-set of doing unnecessary Maintenance.
I would recommend using some thing like ola.hallengren.com/…
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.