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Topic "Transaction isolation level" was discussed 105 times on 23 sites in last 3 months

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transaction isolation level was discussed on the following sites:

	www.oracle.com - 32
	Microsoft TechNet Forums - 28
	Investors Hub - Discussion Groups - 21
	MSDN Forums - 19
	SQL Server Forum - 15

Latest threads on transaction isolation level:

TRANSACTION ISOLATION LEVEL - READ UNCOMMITTED

Started 3 weeks, 1 day ago (2009-10-24 10:55:00) by Brian118

I have a process which normally normally takes ~ 2 hrs to run. This process reads from tables which will not be modified since the source tables are only populated during the ETL process and will populate new tables with transformed data. If I change the transaction isolation level to Read Uncommitted while the process is running, can I expect to see any performance improvements since I'm not ...

Source: Microsoft TechNet Forums

Forum: SQL Server Database Engine

Thread: Show this thread (11 posts)

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RE: TRANSACTION ISOLATION LEVEL - READ UNCOMMITTED

Started 3 weeks, 1 day ago (2009-10-24 16:15:00) by Madhu K Nair

I think it will (may) have impact. In Read UNCommitted system will not issue even Shared lock . Any lock take some resources , so if the number of rows read is more, then RID /Index/Page/Table (i agree that lock escalation may handle this case) may take some resources. And also if you are updating the target table after doing transformation which join many table , in Read committed system ...

Source: Microsoft TechNet Forums

Forum: SQL Server Database Engine

Thread: Show this thread (11 posts)

Size: 844 bytes
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