When a checkpoint occurs or when the lazy writer kicks in due to memory pressure. It could be immediately after the change was made, or it could be several minutes later.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass