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Tag: parallelism
How do I synchronize parallel imports with COPY? [closed]
Question : Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? […]
Serial Plan in plan cache
Question : I have a query which was executing slowly earlier. Later I found out that it was not running […]
sp_who returns more rows than the value of “max degree of parallelism”
Question : sp_configure returns the following values on a server. name minimum maximum config_value run_value max degree of parallelism 0 […]
Why does my parallel query sometimes process billions of extra rows?
Question : I was running some data prep queries when I noticed that one of them sometimes ran much longer […]
Cardinality , Parallel Hint alternative for MS-SQL
Question : UPDATE MARK M SET ARCHIVE_FLAG = ‘N’ WHERE EXISTS (SELECT /*+ cardinality(S1, 10) parallel(S1,8)*/ 1 FROM SHFASG S, […]
In SQL Server, is parallelism per operator, or something else?
Question : I work with a really old DBA who says a lot of weird stuff. Dude has an O’Reilly […]
What’s the biggest bottleneck (time) in writing data to a SQL database?
Question : I’m running an ETL process that is writing about 2 million rows to a SQL Server database. I’m […]
How can I get rid of an unhelpful parallel branch when unpivoting a single row?
Question : Consider the following query that unpivots a few handfuls of scalar aggregates: SELECT A, B FROM ( SELECT […]
Finding Serial plan from Plan cache
Question : My application goes slow sometimes and when i check the query plan plan for a particular operation,i see […]