How to fix fatal: cannot create pack: Too many open files in Git

# Check soft limit (current limit)
ulimit -n

# Check hard limit (maximum allowed)
ulimit -Hn

# View all limits
ulimit -a

# Increase to 8192 (common safe value)
ulimit -n 8192

# Or increase to 65536 for very large repositories
ulimit -n 65536

# Then retry your Git operation
git push origin main

# Edit the limits configuration file
sudo nano /etc/security/limits.conf

# Add these lines at the end (replace 'username' with your user or use '*' for all users)
username soft nofile 65536
username hard nofile 65536

# Or for all users:
* soft nofile 65536
* hard nofile 65536

# Check if pam_limits is enabled
grep pam_limits /etc/pam.d/common-session

# If not present, add:
# session required pam_limits.so

# Edit or create a service override
sudo systemctl edit your-git-service

# Add these lines:
[Service]
LimitNOFILE=65536

# Edit systemd configuration
sudo nano /etc/systemd/system.conf

# Add or modify:
DefaultLimitNOFILE=65536

# Reload systemd
sudo systemctl daemon-reexec

# Lower the gc.auto threshold to trigger GC earlier
# Set to a value below your ulimit -n
git config --global gc.auto 200

# Or disable automatic garbage collection entirely
git config --global gc.auto 0

# Run manual garbage collection
git gc

# Or more aggressive cleanup
git gc --aggressive --prune=now

# First, temporarily increase ulimit if possible
ulimit -n 8192

# Run garbage collection
git gc

# Or use git repack with specific options
git repack -a -d --depth=250 --window=250

# Push your commits to remote
git push origin main

# Delete the local repository
cd ..
rm -rf your-repo

# Clone fresh (without loose objects)
git clone https://github.com/user/your-repo.git

# Limit memory used during packing (100MB)
git config --global pack.windowMemory "100m"

# Limit pack file size
git config --global pack.packSizeLimit "100m"

# Reduce threading to limit concurrent file access
git config --global pack.threads 1

# Reduce delta cache size
git config --global pack.deltaCacheSize "100m"

# Check current limit
ulimit -n

# Temporarily increase (per session)
ulimit -n 4096

# Make permanent by adding to shell profile
echo 'ulimit -n 4096' >> ~/.zshrc
# Or for bash:
echo 'ulimit -n 4096' >> ~/.bash_profile

# Source the profile
source ~/.zshrc

# Create or edit launchd configuration
sudo nano /Library/LaunchDaemons/limit.maxfiles.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>limit.maxfiles</string>
    <key>ProgramArguments</key>
    <array>
      <string>launchctl</string>
      <string>limit</string>
      <string>maxfiles</string>
      <string>65536</string>
      <string>65536</string>
    </array>
    <key>RunAtLoad</key>
    <true/>
  </dict>
</plist>

sudo launchctl load -w /Library/LaunchDaemons/limit.maxfiles.plist

# Run container with increased ulimit
docker run --ulimit nofile=65536:65536 your-image

# Or in docker-compose.yml:
services:
  your-service:
    ulimits:
      nofile:
        soft: 65536
        hard: 65536

apiVersion: v1
kind: Pod
spec:
  containers:
  - name: git-container
    securityContext:
      # Note: requires privileged mode or proper security policies
    resources:
      limits:
        # Some Kubernetes setups allow ulimit configuration