How can i report Activities logs

Hi all!
We use Urbackup for our servers. Sometime we can see the “Used Storage” is 0 byte with Incremantal action, it means our server local backup task has problems. But page “activities” of URbackup only show last 20 activities. Well, we need view more activities.
How can i change setting to show more logs or connect to DB to query what is need?
We instal URbackup on Centos server