[pytest-dev] moving to git / issues?

[Florian Schulze]

On 25 Jun 2015, at 10:53, Floris Bruynooghe wrote:
> On 24 June 2015 at 09:01, Florian Bruhin <me at the-compiler.org> wrote:
>> * Florian Bruhin <me at the-compiler.org> [2015-06-23 15:05:51 +0200]:
>>> After doing a  git gc --aggressive  the repo shrinks from 55 MB to
>>> 9.2 MB for me.
>>>
>>> So for future migrations it might make sense to do that in the
>>> converted git repo before pushing.
>>>
>>> I contacted GitHub support to ask if they can do that on the repo.
>>
>> They now did run it, and the download is around 5.7 MB now :)
>
> Nice!  Thanks for looking into this.

I did some experiments on some of my repositories. I had a 800MB 
repository that shrank to 220MB. You have to be careful though. By 
default the repacking has no memory limit and uses as many threads as 
you have cpu cores. My poor server with 16GB Ram and 8 cores used 20GB 
Swap extensively :) On my laptop the process died at first. You can set 
"git config pack.threads 1" and "git config pack.windowMemory 1g" in 
your repository before you run git gc to avoid that issue. The whole 
process can take a pretty long time depending on your repository.

In general it seems like this is only needed as a final step after a 
migration from another version control system or if you have a lot of 
constant changes in the same files in each commit (I backup database 
dumps with git to keep some history).

Regards,
Florian Schulze