WAL

git clone https://github.com/xpetit/wal
cd wal
docker build --tag github.com/xpetit/wal .
docker run --rm --name wal github.com/xpetit/wal

Output:

[...]
WAL file size: 71 MB
[...]
WAL file size: 140 MB
[...]
WAL file size: 209 MB
[...]
WAL file size: 279 MB
[...]
WAL file size: 350 MB

Uncommenting db.SetMaxOpenConns(1) in main.go fixes the issue, changing --connections 2 to --connections 1 in script.sh as well.