Typical event rate · category

Database log rate: 100 events/s per device

A database source typically produces 100 events per second per device, bursting to 1,000: audit policy decides this, not workload. The rate is an informed estimate, a starting point for a sizing, not a measurement; the event sizes below are measured.

100
events per second, typical
1,000
at the burst
1,030 B
median event size, 1 source
8.9 GB
per device per day

Measured sources in this category

Average bytes per event, measured, and one device's volume at the typical 100 events per second.

SourceBytes per eventA dayA year
Oracle Database1,0308.9 GB3.2 TB

At the median size, a day from one device, 8.9 GB, is about 2 times an hour of YouTube in 4K.

Size a fleet

1,000
events per second
89 GB
per day
8 TB
at retention

Raw bytes, before compression, indexing overhead and replication.

Measure a sample of your own

The figure above is an average; yours will differ, and for database logs what moves it most is this: audit policy decides this, not workload. The profiler reads a sample from database logs in your browser, line by line, one event per line, and reports the bytes per line to set against it. Nothing is uploaded.

Logcaliper, free on iOS, has these sizes and rates built in and sizes a whole list of sources at retention: storage, cluster capacity, nodes.