Thread: pgsql: PublishStartupProcessInformation() to avoid rare hang in recover

PublishStartupProcessInformation() to avoid rare hang in recovery.
Bgwriter could cause hang in recovery during page concurrent cleaning.

Bug report and testing by Bernd Helmle, fix by me

Branch
------
REL8_4_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/7c24bac64c3828d651abfd5e34bd0e0031ab9946

Modified Files
--------------
src/backend/access/transam/xlog.c |    2 +
src/backend/storage/lmgr/proc.c   |   43 ++++++++++++++++++++++++++++++++++++-
src/include/storage/proc.h        |    6 +++++
3 files changed, 50 insertions(+), 1 deletions(-)