Hackers,
The cache in pg_internal.init was reused in days of yore but has been
rebuilt on postmaster startup since v8.1. It appears there is no reason
for this file to be backed up.
I also moved the RELCACHE_INIT_FILENAME constant to relcache.h to avoid
duplicating the string.
I'll add this to the 2017-11 CF.
Thanks,
--
-David
david(at)pgmasters(dot)net