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Why there are too much warnings in logs (tarantool-1.10.3-0-g0b7078a):

readahead limit is reached

How to eliminate them?

kk.
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Nick Karlov
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1 Answers1

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Generally that means that there are more incoming requests to Tarantool than it can handle (so they are throttled). If you see this occasionally - it's ok, it is related to workload spikes. If you see them constantly - you should explore your workload more thoroughly and, depending on results:

  1. adjust readahead parameter https://www.tarantool.io/en/doc/1.10/reference/configuration/#cfg-networking-readahead
  2. adjust net_msg_max parameter https://www.tarantool.io/en/doc/1.10/reference/configuration/#cfg-networking-net-msg-max
  3. optimize your application code
  4. think about scaling out to handle workload (replication, sharding)
Dmitry Sharonov
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  • As I understood, `net_msg_max` is a number of fibers for consiming the queue and processing requests. Is there any limits for the value? – Nick Karlov Jun 24 '19 at 10:15