Log Message:
-----------
Retry in FileRead and FileWrite if Windows returns ERROR_NO_SYSTEM_RESOURCES.
Also add a retry for Unixen returning EINTR, which hasn't been reported
as an issue but at least theoretically could be. Patch by Qingqing Zhou,
some minor adjustments by me.
Modified Files:
--------------
pgsql/src/backend/storage/file:
fd.c (r1.122 -> r1.123)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/file/fd.c.diff?r1=1.122&r2=1.123)
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TIP 5: don't forget to increase your free space map settings
