Shared page cache ready to be commited in firebird 3.0

Vlad Khorsun wrote about the Shared page cache implementation in 3.0 :
After more than a year of development, testing, switching on another tasks and returning back i’m ready to commit shared page cache implementation into trunk.
I consider it stable enough to be committed into SVN. It runs some stability tests more than 10 hours for longest run and many shorter runs at different configurations.
Here i want to do overview of changes, what was tested, what was not, and what
is work in progress.

You can read more about Shared page cache in the Firebird 3.0 presentation
Update:Feature commited into trunk