You don't show which part of the docs you're looking at. Kafka contains the README, which documents the following environment variables for the benchmark test:

TESTING

The following environment variables change the way Kafka Benchmark tes
+t behave
("t/99_usage/03_kafka_bench.t"):

   # the IO timeout in secs
   KAFKA_BENCHMARK_TIMEOUT = 0.5

   # minimum length of test messages
   KAFKA_BENCHMARK_LEN_MIN = 200

   # maximum length of the test messages
   KAFKA_BENCHMARK_LEN_MAX = 200

   # number of messages for batch testing
   KAFKA_BENCHMARK_PACKAGE = 5000

   # number of messages for a single test
   KAFKA_BENCHMARK_SINGLE = 5

[download]

I find them fairly self-descriptive and I wouldn't worry about a benchmark test failing too much.

In reply to Re: Experience with the Kafka interface modules by Corion
in thread Experience with the Kafka interface modules by Wiggins

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