Technology & Computing
Kafka Partition Throughput & Consumer Lag Calculator
Estimate topic throughput capacity from partition count and per-partition rate, plus time to clear consumer lag.
Your inputs
Change any value to update the result instantly.
Time to clear consumer lag
16.6667 min
Topic max throughput
120 MB/s
Net drain rate
5,000 msg/s
Current lag
50,00,000 msgs
Partitions
12
Lag will clear as long as consume rate stays above produce rate.
Formula and working
Topic throughput = partitions × per-partition throughput; Time to clear lag = lag ÷ (consume rate − produce rate)
- 1
Collect the inputs
Number of partitions = 12; Per-partition throughput (MB/s) = 10 MB/s; Current consumer lag (messages) = 5,000,000; Consumer processing rate (msgs/sec) = 20,000 msg/s; Producer rate (msgs/sec) = 15,000 msg/s
- 2
Apply the formula
Topic throughput = partitions × per-partition throughput; Time to clear lag = lag ÷ (consume rate − produce rate)
- 3
Result
Time to clear consumer lag = 16.6667 min
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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