Re: pg_clog and pg_xlog empty, postgresql refuses to start

"Glen Parker" <glenebob(at)nwlink(dot)com> writes:
> First things first: Postgresql 8.4.2 on Fedora Core 2 X86.

I take it this message fell through a time warp ;-)

> Something seems to have happened to my pg_xlog and pg_clog directories after
> (I believe) a power outage. In the course of trying to figure out why the
> server wouldn't start, I cleaned out pg_clog and pg_xlog, in an obviously
> vain attempt to reset things. I was under the impression that the server
> could start without those files. Now I seem to be stuck.

That was probably not your best first move...

I'd put back the clog files if at all possible. If not you can
substitute zero-filled 256K files for each clog file the server
complains about not finding, but realize that you *will* be losing
transactions in whole or in part.

As for pg_xlog, you can cons up dummy xlog contents with pg_resetxlog,
but again you'd be better off with the real thing. The dummy files will
not be capable of replaying whatever happened since your last checkpoint.

What failures were you getting *before* you decided to try this?

regards, tom lane