pgsql-bugs@postgresql.org writes:
> I would like to know what this message means, maybe a bug??
> ERROR: XLogFlush: request 0/6173A2D8 is not satisfied --- flushed only to 0/616E519C
This suggests a corrupted LSN on some disk page, but without any context
I can't say more than that.
> This message is showed by psql in a random mode.
Is the "request" value always the same? If so, it's probably just one
page that's messed up --- you could figure out which one with a
debugger. (XLogFlush unfortunately doesn't know why it's being called,
so it can't print any more info.)
regards, tom lane