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dnsdist: Enable sharding by default, greater pipe buffer sizes #10204

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merged 3 commits into from Mar 24, 2021

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The sharding code has seen a lot of traffic by now and can safely be enabled by default, since it provides much better performance (less contention).
Determining the optimal size of pipe buffers on all systems is hard, but let's use a better default on Linux where we know it works well. Also increase the number of queued TCP/DoT connections now that the buffer is big enough.

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I have:

  • read the CONTRIBUTING.md document
  • compiled this code
  • tested this code
  • included documentation (including possible behaviour changes)
  • documented the code
  • added or modified regression test(s)
  • added or modified unit test(s)

The sharding code has seen a lot of traffic by now and can safely be
enabled by default, since it provides much better performance (less
contention).
Determining the optimal size of pipe buffers on all systems is hard,
but let's use a better default on Linux where we know it works well.
Also increase the number of queued TCP/DoT connections now that the
buffer is big enough.
@rgacogne rgacogne merged commit 07bc63d into PowerDNS:master Mar 24, 2021
@rgacogne rgacogne deleted the ddist-tuning-defaults branch March 24, 2021 12:37
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