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.
Measured sources in this category
Average bytes per event, measured, and one device's volume at the typical 100 events per second.
| Source | Bytes per event | A day | A year |
|---|---|---|---|
| Oracle Database | 1,030 | 8.9 GB | 3.2 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
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.