>>>>> "Tom" == Tom Lane <[EMAIL PROTECTED]> writes:
Tom> People who hang around Postgres too long tend to think that Tom> MVCC is the obviously correct way to do things, but much of Tom> the rest of the world thinks differently ;-) It works the other way too ... people who come from the locking world find it difficult to wrap their heads around MVCC. A big part of this is because Gray's original paper on transaction isolation defines the different levels based on what kind of lock acquisitions they involve. A very nice alternative approach to defining transaction isolation is "Generalized isolation level definitions" by Adya, Liskov and O'Neill that appears in ICDE 2000. -- Pip-pip Sailesh http://www.cs.berkeley.edu/~sailesh ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html