You can have a look at the directories of your event collector, which has one directory per day and below that one directory per hour to store the payloads
# Statistik for a certain day
du -s -h /store/ariel/events/payloads/2022/11/21/
# Statistik for the indiviual hours of that day
du -s -h /store/ariel/events/payloads/2022/11/21/*
Regards
Thomas
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SIEM-2020
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