"Gregory S. Williamson" <gsw@globexplorer.com> writes:
>> 2006-09-26 10:02:15.124 PDT 1387333718 ERROR: could not open segment 1 of
>> relation 1663/43801/7274801 (target block 478216192): No such file or
>> directory
This is most likely caused by trying to follow a bogus item pointer in
an index. If the problem went away after a restart, the bogus value
could not have been on disk but must have been in a bad in-memory copy
of an index page. Which suggests a hardware glitch ... although if you
are using contrib/ltree, I recall seeing several bug fixes go by
recently that were described as fixing potential ltree-index corruption
issues.
regards, tom lane