It is important to check if git configured with default settings. Especially forcing of creation of multiple smaller packs significantly increases repo size.

git config --global -l
git config --system -l

Especially take attention for options like:

• deltaCacheSize = 10m
• packSizeLimit = 10m
• windowMemory = 10m

Remove unreachable objects:

git count-objects -v
git gc  # this is enough to remove loose objects and repack repo
git count-objects -v
 
# more instruction
git repack -Ad # Remove dangling objects from packfiles
git prune # Remove dangling loose objects
git gc --aggressive --prune=now --force  || rm -f .git/objects/*/tmp_* && rm -f .git/objects/*/.tmp-*
 
git count-objects -v

git was killed by host monitor process or oom due to memory usage. Check syslog for OOM entries.

Solution:

[core]
    packedGitLimit = 32m
    packedGitWindowSize = 32m
    deltaCacheSize = 10m

Disable compression:

git config core.compression 0
git config core.loosecompression 0
git config pack.window 0

git command running under user 'git' with gitlab installed looks for configuration in following places:

• current git repo
• /etc/gitconfig
• /var/opt/gitlab/.config/git/config
• /var/opt/gitlab/.gitconfig

This is a user config gile, and file is generated form /opt/gitlab/embedded/cookbooks/gitlab/templates/default/gitconfig.erb

But if git binary from gitlab is used

sudo -u git -H "/opt/gitlab/embedded/bin/git" config -l

/opt/gitlab/embedded/bin/git --git-dir=/home/git-data/repositories/funny/linux.git config -l
/opt/gitlab/embedded/bin/git --git-dir=/home/git-data/repositories/funny/linux.git bundle create /tmp/linux.bundle --all

then, file /opt/gitlab/embedded/etc/gitconfig is used. To modify this file:

gitlab.rb

omnibus_gitconfig['system'] = {.
    "core"     => ["packedGitLimie = 32m", "packedGitWindowSze = 32m", "deltaCacheSize = 32m" ],
    "receive"  => ["fsckObjects = true"],
    "pack"     => ["deltaCacheSize = 32m", "packSizeLimit = 32m", "windowMemory = 32m", "threads = 2" ]
}

Test config:

gitlab-ctl show-config

Regenerate config:

gitlab-ctl reconfigure

sudo -u git bash
cd /var/opt/gitlab/git-data/repositories/{namespace}/{repository}.git
git gc --aggressive