/var/log/nginx/access.log {
    missingok
    maxsize 1G
    nodelaycompress
    postrotate
        syslog-ng-ctl reopen >/dev/null
    endscript
}

/var/log/nginx/error.log {
    missingok
    maxsize 64M
    nodelaycompress
    postrotate
        syslog-ng-ctl reopen >/dev/null
    endscript
}