On 2020-Feb-05, Nick Renders wrote: > Is there anything specific I should check in our postgres installation / > database to make sure it is running ok now? Anyway to see what the > consequences were of purging that one pg_clog file?
Losing pg_clog files is pretty bad, and should not happen; then again, this might have been something else (ie. the file was maybe not lost). That said, wrongly overwriting files is even worse. By zeroing an existing pg_clog file, you marked a bunch of transactions as aborted. Your data is now probably inconsistent, if not downright corrupt. I would be looking for my most recent backup ... If you're very lucky, your database might be pg_dumpable. I would try that, followed by restoring it in a separate clean instance and seeing what happens. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
