Mercurial > p > roundup > code
view website/www/contact.txt @ 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 | fefd8263ee4d |
| children | 6f5054751fb6 |
line wrap: on
line source
Contact ======= We maintain the following mailing lists: =================== ========================== roundup-users_ archives `[SourceForge]`__ roundup-devel_ archives `[SourceForge]`__ roundup-checkins_ archives `[SourceForge]`__ =================== ========================== These lists are moderated to protect them against spam. Please sign up if you intend to mail repeatedly. You may talk to Roundup developers directly via IRC irc://irc.oftc.net/roundup using IRC client or through WebChat_ interface. .. _roundup-users: https://sourceforge.net/projects/roundup/lists/roundup-users .. _roundup-devel: https://sourceforge.net/projects/roundup/lists/roundup-devel .. _roundup-checkins: https://sourceforge.net/projects/roundup/lists/roundup-checkins .. __: https://sourceforge.net/p/roundup/mailman/roundup-users/ .. __: https://sourceforge.net/p/roundup/mailman/roundup-devel/ .. __: https://sourceforge.net/p/roundup/mailman/roundup-checkins/ .. _WebChat: https://webchat.oftc.net/?randomnick=1&channels=roundup&prompt=1