Re: question: what does "garbage" field in "git count-objects -v" represent? Is it broken?
- From
Junio C Hamano <gitster@pobox.com>
- Date
- Aug 28, 2025, 17:05 UTC
- Message-ID
- <xmqqy0r3v0jz.fsf@gitster.g>
- In-Reply-To
- <CADR1ei4LFVoLhMyya+wx8dXBmrRNSNy6L5Ye_MJgL4kzgtVR_A@mail.gmail.com>
Daniele Sassoli <danielesassoli@gmail.com> writes:
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> When reading the output `git count-objects -v` there is a `garbage` field. At > first I thought this would highlight objects that are considered "garbage", i.e. > could be garbage collected. However, I kept noticing that this wasn't the case, > despite my repository having plenty of dangling objects (that where removed once > I run `git gc --prune=now`), garbage kept being 0.
count-objects is about quick housekeeping stats and does not (and should never) analyze reachability like fsck does, which is required to tell which objects are dangling.
Show 8 quoted lines
> I then turned to reading the docs, which state: > garbage: the number of files in the object database that are neither > valid loose objects nor valid packs > > I don't think I've ever seen a definition of an invalid object? > I tried adding random chars to an object, effectively corrupting > the repository(which `git fsck` correctly picked up), but > count-objects kept returning 0 at the garbage field.
count-objects is about quick housekeeping stats and does not (and should never) analyze object contents like fsck does, which is required to tell which objects are corrupt.
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> The only way I've been able to get count-objects to report some garbage is by > creating files in the packs directory (or in any of the sub-directories of > `objects` folder) with random names, like "test", or sometimes I've seen it > report the existence of lock files or even preserved files. > > So my question is, am I fundamentally misunderstanding what garbage means, are > the docs simply unclear or is the functionality not working as expected? > > Thanks for taking the time to read this and respond. > Dani
You are fundamentally understanding correctly. The command tells you it found a garbage when you do this:
$ mkdir -p .git/objects/00 && >.git/objects/00/tmp-garbage
$ git count-objects -v
warning: garbage found: .git/objects/00/tmp-garbage