Mercurial > p > roundup > code
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Try to handle multiple connections better.
The session database is a hot spot. When multiple requests (e.g. 20)
come in at the same time session database contention can get great.
The original code didn't retry session database access when the open
failed. This resulted in errors at the client.
The second pass delayed 0.01 seconds and retried. It was better but we
still had multiple second stalls. I think the first request got in,
everybody else backed up and then retried at the same time. Again they
stepped on each other. With logging I would see many counters go all
the way to low single digits or to -1 indicating falure.
This pass uses randomint to generate delays from 0-.125 seconds in 5ms
increments. This performs better in testing. I rarely saw a counter
less than 13 (2 failed retries). Current logging starts after 6
failures and counts down until success or failure.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Thu, 16 Dec 2021 20:02:00 -0500 |
| parents | 45e8d10a9609 |
| children | 6f5054751fb6 |
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Code ==== Project history is maintained in `CHANGES.txt <https://sourceforge.net/p/roundup/code/ci/tip/tree/CHANGES.txt>`_ file in code repository of Roundup, which can also be viewed online through SourceForge `web interface <https://sourceforge.net/p/roundup/code/ci/default/tree/>`_. Get sources ----------- Official **read-only access** to Mercurial repository is provided through :: hg clone http://hg.code.sf.net/p/roundup/code roundup **Read/write access** requires SSH password or SSH key authorization (see `SourceForge.net docs for details <https://sourceforge.net/p/forge/documentation/Mercurial/>`_) :: hg clone ssh://USERNAME@hg.code.sf.net/p/roundup/code roundup You also need to be added as a Roundup developer for write access - ask for it on the :doc:`roundup-devel list <contact>`. Run demo -------- Roundup doesn't need any dependencies and works out of the box. Demo is accessible at http://localhost:8917/demo/ by default :: cd roundup python demo.py Execute tests ------------- :: python run_tests.py See repository `README.txt <https://sourceforge.net/p/roundup/code/ci/tip/tree/README.txt>`_ for more info.