Important. For High Volume ETL scenarios, blocking transformations should be avoided wherever possible. For the Merge Join scenarios in Project REAL, the data used in Merge Joins is pre-sorted in the back end by stored procedures and / or select queries which deliver the data. Given that joins...
For further information, see the "Hyper-Threading" sidebar.Figure 2 Performance counters to watchExpand table Performance Counter Counter Object Threshold Notes % Processor Time Processor > 80% Potential causes include memory pressure, low query plan reuse, non-optimized queries. Context Switches/sec...
Tips Offline index operations typically complete faster than online operations. They should be used when tables will not be accessed by queries during the operation, for example after loading data into staging tables as part of a sequential ETL process....
ETL World Record!Today at the launch of SQL Server 2008, you may have seen the references to world-record performance...Date: 02/27/2008Spool operators in query plan...I came across a question in the relationalserver.performance newsgroup where a customer was......
They should be used when tables will not be accessed by queries during the operation, for example after loading data into staging tables as part of a sequential ETL process. Limitations and restrictions Rowstore indexes with more than 128 extents are rebuilt in two separate phases: logical and ...
statement and the row of data accessed by it. This temporary work area stores the data, which is retrieved from the database, to manipulate it. A cursor can hold more than one row but can process only one row at a time. A cursor is required to process rows individually for queries. ...
• Familiar with ETL tool like Informatica will be preferred (optional)• Project management skills needed.• Strong communication, interpersonal and organization skills• Good communication (write and speak) in English• Able to understand &deliver what service manager requested on time with ...
One way of testing legacy Teradata SQL for compatibility with Azure Synapse is to capture some representative SQL statements from the legacy system query logs, prefix those queries withEXPLAIN, and (assuming a "like-for-like" migrated data model in Azure Synapse with the same table and column ...
This entry was posted inCBO,ETL As my electrical engineering lecturer at university used to joke, there are only two faults in electricity: 1) No contact where it is needed. 2) There is contact where it is not needed. You can often think the same way when looking for the causes of a...