![]() However, you can control the isolation level explicitly on a connection. You cannot change the database default isolation level. The upside to this transfer is better performance. Azure SQL Database default database wide setting is to enable read committed snapshot isolation (RCSI) by having both the READCOMMITTEDSNAPSHOT and ALLOWSNAPSHOTISOLATION database options set to ON. In general, therefore, snapshot isolation puts some of the problem of maintaining non-trivial constraints onto the user, who may not appreciate either the potential pitfalls or the possible solutions. ![]() The next section is "Making Snapshot Isolation Serializable" to get around this. When you want to save the changes you made to the database (Create, Update, Delete), EntityFramework is smart enough to create a transaction without your notice behind the scenes to wrap the changes. Read "Snapshot isolation" (Wikipedia) for more on write-skew anomalies. The default isolation mode is read committed and fits perfectly to 99 of your needs, eg. Because the table was created inside a transaction, the metadata about the table is uncommitted, and thus unavailable to the second session. The developers are the only ones that can tell you if your application supports RCSI. Most important, snapshot isolations are not safe in many cases by default. 1 2 3 USE AM2WTF GO SELECT OBJECTNAME (581577110) That’s just going to sit there and wait, and wait, and wait, and wait. 1 Answer Sorted by: 0 Yes, when failover occurs the secondary changes back to read committed if thats how the DB is configured on the primary. "Performance Impact: The Potential Cost of Read_Committed_Snapshot" (Linchi Shea). ![]() It will also increase load on your tempdb and CPU. Ensure there are no other users connected to the Service Desk database (step 3 will hang indefinitely if there are). If you have locking problems then you have a problem with your code: it isn't the database engine. ![]()
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