Hi,
Currently pg_start_backup() accesses the shared ControlFile
by using ControlFileLock with LW_EXCLUSIVE lock mode. But
since that access is read-only operation, LW_SHARED should
be chosen instead of LW_EXCLUSIVE.
The attached patch changes the lock mode which pg_start_backup()
uses. Is it worth applying this patch?
Regards,
--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center