Re: Safe to delete files?

On 4/12/19 3:11 PM, Paul van der Linden wrote:
> Hi,
>
> For my process, I needed to drop all the tables in a tablespace except one
> which I truncated.
> After that I would have expected to have a couple of KB max in that
> folder, but there was about 200GB in it.

Did you vacuum afterwards?

>
> There were 2 sets of files (<id1>, <id1>.1 .. <id1>.99, and the same for id2).
> Tried the various options from
> https://blog.2ndquadrant.com/postgresql-filename-to-table/ and oid2name
> (with -i), to trace it back to a table but all came up empty.
>
> Now this folder has a bit of a history spanning several postgres versions
> and upgrades, and sometime in the past one of the upgrades went horribly
> wrong, so my first thought was that this was possibly some leftovers from
> that mishap, but the filetimes were a bit later than that.
> Also hard to tell because those tables are used as write-once, read-alot
> so could not base the last usage on filedate.
>
> Normally I probably would dare to risk deleting those files, but after the
> dropping and truncating, the 2 files without extension had the time of
> drop/truncate and were 0 bytes in length (unfortunately I didn't check the
> filesize before drop/truncating).
>
> Are there other options to see if these files are leftovers from previous
> stuff and not used by postgres (so i can safely delete them)?
>
> Postgres 11, just one used database on it (the other one being a postgis
> template), running on windows server 2012.
>
> In replies please use reply to all...

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