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question asked: Jul 31 '12, 4:50 p.m.
question was seen: 3,864 times
last updated: Jul 31 '12, 10:50 p.m.

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Requirement for setting row versioning to READ_COMMITTED

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Kevin Cool (1●2●4●4) | asked Jul 31 '12, 4:50 p.m.
The documentation says it is required to set row versioning on database to READ_COMMITTED Snapshot to ON and this will have huge impact on TempDB.  Why is it necessary to set this option apart from reducing locks. 

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Benjamin Silverman (4.1k●6●10) | answered Jul 31 '12, 10:50 p.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER
Hi Kevin,

This article indicates that turning on READ_COMMITTED_SNAPSHOT increases concurrency as well as reducing deadlocks.  It is an optimization setting which does impact the size of the tempdb.  Testing has revealed significant performance improvements and reduced locks with the row level versioning enabled.  See this WI for details.  Hope it helps,

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