Reproduce snapshot isolation update conflict error 3960, compare read committed snapshot, and retry the whole transaction safely.
Optimized Locking in SQL Server 2025: What Changes for Blocking
Enable optimized locking in SQL Server 2025 with ADR and RCSI, then compare lock counts and blocking while checking LAQ limits.
ANSI Isolation Levels Quiz: Which Level Lets You Read Uncommitted Data?
This ANSI Isolation Levels Quiz asks which level lets one session read a price that another session has not committed. A two-window test on SQL Server 2025 shows what each level returns. It also shows how READ COMMITTED SNAPSHOT removes the wait.
Lost Updates: Optimistic Concurrency With a rowversion Column
Prevent lost updates with optimistic concurrency and a rowversion token, detect zero-row conflicts, and compare short locking transactions.
SQL SERVER – Check the Isolation Level with DBCC useroptions
What isolation level is your session using? Run DBCC useroptions to see it, along with dateformat, datefirst, language and other SET options.
SQL SERVER – Simple Example of Snapshot Isolation – Reduce the Blocking Transactions
Snapshot Isolation has been in SQL Server since 2005, yet many shops still skip it. A simple example shows how it can reduce blocking transactions.
Watching the tempdb Version Store
Watch the tempdb version store with per-database space DMVs, find transactions that delay cleanup, and plan capacity from trends.