"Reading from databasechangelog" is so lowly when use liquibase-2.0.rc6

General Discussion
1

my database is postgres.
when use liquibase-1.9.5, reading database change log is ok,
but there is a bug which is “drop all” for the foreign key.
so i update the version to 2.0.rc6,
when i run my script with 2.0.rc6, it always stops in “Reading from databasechangelog” for a long time (about 8 mins).
is this a bug?

ps: there is a change set which contains 140,000 data in my db.

2

It shouldn’t be that slow.  What do you mean by “there is a change set which contains 140,000 data in my db” ?

Nathan