The system log file is the file that takes the most space for BioStar 2. It keeps the logs for troubleshooting purposes, and it is created daily by the BioStar 2 service. 

It is recommended to leave the system logs as is but if you would like to delete it manually because there are no issues at your site, refer to the link below: 

[BioStar 2] Deleting System Logs

If you would like to change the system log level to have less data created daily, you can follow the steps below: 

Caution:  If you change the level higher than the default level (4-5), the system logs will not be helpful for troubleshooting purposes. 

You can find the log level configuration file in your BioStar 2 installation folder/log.conf as shown below: 

1. Stop BioStar 2 services in BioStar Setting. 

2. Open log.conf file. 

3. Change the level value and save the file. 

* Default is 3. Higher level (5) has less detail and lower level (1) has more detail. 

* Level meaning: TRACE(1) /DEBUG(2) /INFO(3) /WARN(4) /ERROR(5)

* If you would like the least amount of space used, you would change to 5

4. Start BioStar 2 with BioStar Setting