Partially revoke attempt to improve performance with many savepoints.
Maintain difference between subtransaction release and commit introduced
by earlier patch.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/df383b03e6f761c9b5bb12aa2339795ab44aa054

Modified Files
--------------
src/backend/access/transam/xact.c |   27 ++++++++++++---------------
1 files changed, 12 insertions(+), 15 deletions(-)

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Next:	From: Bruce Momjian	Date: 2011-09-07 13:24:40
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