Locks

RCSI with foreign keys, NULL values and paramater sniffing behavior

In this blog post let’s go back to the roots (DBA concern) with a discussion with one of my friends about a weird transaction locking issue. In fact, this discussion was specifically around two questions. The(…)

Result cache invalidation caused by DML locks

By Franck Pachot . In a previous post about Result Cache, I was using 'set autotrace on' in my session to see when the result cache hit saves the logical reads. I got a comment, by(…)

Oracle serializable is not serializable

By Franck Pachot . Did you know that when you set isolation level to SERIALIZABLE, it is not serializable but SNAPSHOT? This isolation level is lower than serializable. I've never thought about it until I read Markus Winand(…)