drupal/fileslog
Release 1.1.1

This module provides an alternative to dblog and syslog modules. If your site is database heavy and you'd like to take some load off of your database, but can't use syslog or want to avoid using it, this module saves logs to the private filesystem within Drupal. It saves the logs as [timestamp]-[severity].json, that way we can sort by timestamp and filter by severity easily.