annotate roundup/anypy/cookie_.py @ 6565:2c2dbfc332ba

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 4cb860c33b37
children 07ce4e4110f5
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Richard Jones <richard@users.sourceforge.net>
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74476eaac38a more modernisation
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2 try:
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dfd0bcc947e5 Add comments about supported anypy python versions
John Kristensen <john@jerrykan.com>
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3 # Python 3+
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4 from http import cookies as Cookie
74476eaac38a more modernisation
Richard Jones <richard@users.sourceforge.net>
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5 from http.cookies import CookieError, BaseCookie, SimpleCookie
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Richard Jones <richard@users.sourceforge.net>
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6 from http.cookies import _getdate as get_cookie_date
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4cb860c33b37 flake8 replace bare except with except ImportError.
John Rouillard <rouilj@ieee.org>
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7 except ImportError:
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John Kristensen <john@jerrykan.com>
parents: 4362
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8 # Python 2.5-2.7
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9 from Cookie import CookieError, BaseCookie, SimpleCookie
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10 from Cookie import _getdate as get_cookie_date

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