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 | cbc18a8bc61f |
| children | c9b56477fb41 |
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Acknowledgements ================ The Roundup Initative is a group of people that regularly work together to produce new releases of the Roundup Issue Tracker. We like to thank our community and all organisation and people that support us doing so with code, money, time, testing, reports, ideas and everything else that helped! `Announcement with changelog for current release.`_ .. _`Announcement with changelog for current release.`: announcement.html 2.1 --- 2.1.0 ~~~~~ Maintainer: John Rouillard, Ralf Schlatterbeck Release Manager: John Rouillard Developer activity by changesets:: rouilj at ieee.org 178 *************************************************** rsc at runtux.com 29 ******** cedric.krier at b2ck.com 6 ** cmeerw at cmeerw.org 1 john at jerrykan.com 1 Tobias Herp 1 2.0 --- 2.0.0 ~~~~~ Maintainer: Ralf Schlatterbeck, John Rouillard Release Manager: John Rouillard Developer activity by changesets:: rouilj at ieee.org 62 *************************************************** rsc at runtux.com 11 ********* cmeerw at cmeerw.org 4 *** 2.0.0b0 ~~~~~~~ Maintainer: Ralf Schlatterbeck, John Rouillard Release Manager: John Rouillard Developer activity by changesets:: rouilj at ieee.org 133 ************************************************ cmeerw at cmeerw.org 35 ************* rsc at runtux.com 10 **** jsm at polyomino.org.uk 1 2.0.0a0 ~~~~~~~ Maintainer: Ralf Schlatterbeck, John Rouillard Release Manager: John Rouillard Developer activity by changesets:: rouilj@ieee.org 13674 *************************************************************************************** jsm@polyomino.org.uk 4746 ****************************** cmeerw@cmeerw.org 3622 *********************** dangchau1991@yahoo.com 3374 ********************* rsc@runtux.com 2871 ****************** ezio.melotti@gmail.com 103 * john@jerrykan.com 40 bernhard@intevation.de 29 martin.v.loewis 8 cedric.krier@b2ck.com 6 tekberg@uw.edu 6 gabriele.roeger@unibas.ch 4 Other contributers Chau Nguyen, Andreas (anrounham14), Robert Klonner Garth Jensen 1.6 --- 1.6.1 ~~~~~ Maintainer: Ralf Schlatterbeck, John Rouillard Release Manager: John Rouillard Developer activity by changesets:: rouilj at ieee.org 19 ********************************************* bernhard at intevation.de 1 ** jsm at polyomino.org.uk 1 ** Joseph Myers, Cédric Krier, hannob/JulienPalard 1.6.0 ~~~~~ Maintainer: Ralf Schlatterbeck, John Rouillard Release Manager: John Rouillard Developer activity by changesets:: rouilj at ieee.org 234 ********************************************** rsc at runtux.com 30 ****** john at jerrykan.com 26 ***** bernhard at intevation.de 10 ** esr at thyrsus.com 8 ** techtonik at gmail.com 5 * dangchau1991 at gmail.com 1 pf at artcom-gmbh.de 1 thomas at intevation.de 1 Frank Niessink, Anthony (antmail), Bruce Tulloch, kinggreedy, David Wolever, Tom Ekberg, Peter Funk, Daniel Diniz, W. Trevor King, Igor Ippolitov, Joseph Myers, r.david.murray, martin.v.loewis, Henry (henryl), David Wolever, Stuart McGraw (smcgraw), Philipp Gortan (mephinet), Ezio Melotti, Heiko Stegmann, Trent Gamblin, Anton Schur 1.5 --- 1.5.1 ~~~~~ Maintainer: Ralf Schlatterbeck Release Manager: Anatoly Techtonik Developer activity by changesets:: hg churn -c --rev 1.5.0:1.5.1 techtonik@gmail.com 98 ********************************************** bernhard@intevation.de 44 ********************* Bernhard Reiter rsc@runtux.com 37 ***************** Ralf Schlatterbeck john@jerrykan.com 26 ************ John Kristensen thomas@intevation.de 22 ********** Thomas Arendsen Hein rouilj@ieee.org 5 ** John P. Rouillard caulagi@gmail.com 2 * Pradip Caulagi ced@b2ck.com 1 Cédric Krier Mathias Behrle, Ezio Melotti, R David Murray, James Mack, Thibault Fevry, Kai Storbeck, Kay Hayen, Karl-Philipp Richter 1.5.0 ~~~~~ Maintainer: Ralf Schlatterbeck:: hg churn -c --rev 1.4.21:1.5.0 techtonik@gmail.com 37 ********************************************** Anatoly Techtonik bernhard@intevation.de 17 ********************* Bernhard Reiter caulagi@gmail.com 16 ******************** Pradip Caulagi rouilj@ieee.org 8 ********** John P. Rouillard rsc@runtux.com 6 ******* Ralf Schlatterbeck thomas@intevation.de 5 ****** Thomas Arendsen Hein Tom Ekberg, Erik Hanspers pre 1.5.0 --------- Go Ping, you rock! Also, go Common Ground, ekit.com and Bizar Software for letting me implement this system on their time. Thanks also to the many people on the mailing list, in the sourceforge project and those who just report bugs: Christian Aastorp, Thomas Arendsen Hein, Nerijus Baliunas, Benni Bärmann, Anthony Baxter, David Benjamin, Marlon van den Berg, Bo Berglund, Olly Betts, Stéphane Bidoul, Rafal Bisingier, Cameron Blackwood, Jeff Blaine, Duncan Booth, Seb Brezel, J Alan Brogan, Titus Brown, Steve Byan, Brett Cannon, Godefroid Chapelle, Pradip Caulagi, Eli Collins, Roch'e Compaan, Wil Cooley, Joe Cooper, Kelley Dagley, Bruno Damour, Bradley Dean, Toby Dickenson, Paul F. Dubois, Hauke Duden, Eric Earnst, Peter Eisentraut, Andrew Eland, Jeff Epler, Tom Epperly, Tamer Fahmy, Thibault Févry, Vickenty Fesunov, Hernan Martinez Foffani, Trent Gamblin, Stuart D. Gathman, Martin Geisler, Ajit George, Dirk Geschke, Frank Gibbons, Johannes Gijsbers, Christian Glass, Gus Gollings, Philipp Gortan, Dan Grassi, Robin Green, Jason Grout, Charles Groves, Engelbert Gruber, Bruce Guenter, Tamás Gulácsi, Satchidanand Haridas, Sebastian Harl, Ralf Hemmecke, Juergen Hermann, Tobias Herp, Uwe Hoffmann, Alex Holkner, Tobias Hunger, Werner Hunger, Simon Hyde, Paul Jimenez, Christophe Kalt, Timo Kankare, Brian Kelley, James Kew, Sheila King, Michael Klatt, Bastian Kleineidam, Robert Klonner, Axel Kollmorgen, Cédric Krier, John Kristensen, Detlef Lannert, Andrey Lebedev, Henrik Levkowetz, David Linke, Martin v. Löwis, Fredrik Lundh, Jochen Maes, Will Maier, Ksenia Marasanova, Georges Martin, Gordon McMillan, Christof Meerwald, John F Meinel Jr, Roland Meister, Ezio Melotti, Ulrik Mikaelsson, John Mitchell, Ramiro Morales, Toni Mueller, Joseph Myers, Chau Nguyen, Stefan Niederhauser, Truls E. Næss, Bryce L Nordgren, Patrick Ohly, "om", Luke Opperman, Anthony Pankov, Eddie Parker, Will Partain, Timo Paulssen, Benjamin Pollack, Peter Pöml, Ewout Prangsma, Marcus Priesch, Eric S. Raymond, Bernhard Reiter, Roy Rapoport, John P. Rouillard, Luke Ross, Jesse Ruderman, Ollie Rutherfurd, Toby Sargeant, Giuseppe Scelsi, Ralf Schlatterbeck, Gregor Schmid, Florian Schulze, Klamer Schutte, Dougal Scott, Stefan Seefeld, Jouni K Seppänen, Jeffrey P Shell, Dan Shidlovsky, Joel Shprentz, Terrel Shumway, Emil Sit, Alexander Smishlajev, Nathaniel Smith, Leonardo Soto, Maciej Starzyk, Heiko Stegmann, Kai Storbeck, Mitchell Surface, anatoly techtonik, Jon C. Thomason, Mike Thompson, Hubert Touvet, Michael Twomey, Joseph E. Trent, Karl Ulbrich, Martin Uzak, Darryl VanDorp, J Vickroy, Timothy J. Warren, Jakub Wilk, William (Wilk), Tue Wennerberg, Matt Wilbert, Chris Withers, David Wolever, Cheer Xiao, Milan Zamazal.