The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/12/transaction-iso.html Description:
Let's say I have two transactions running in Serializable isolation: T1: Reads a row T2: Reads the same row T1: Updates the row T1: Commits T2: Commits You will not get an error on the second commit. These appear to fit the description of concurrent transactions, and running one before the other would give different results in the reading of the row by T2, depending on which transaction was executed first. So how does this square with the docs that state "it monitors for conditions which could make execution of a concurrent set of serializable transactions behave in a manner inconsistent with all possible serial (one at a time) executions". This seems quite misleading, but I understand there may just be an aspect of this that I am not understanding.
