VirtualTam's bookmarks

1. What is the "N+1 selects problem" in ORM (Object-Relational Mapping)? 2024-02-12

   tags: database, performance, programming/sql

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2. The XY Problem 2023-08-25

   tags: discussion, forum, information, question

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   The XY problem is asking about your attempted solution rather than your actual problem. This leads to enormous amounts of wasted time and energy, both on the part of people asking for help, and on the part of those providing help.

   • https://meta.stackexchange.com/questions/66377/what-is-the-xy-problem
   • https://www.perlmonks.org/?node=XY+Problem
   • http://mywiki.wooledge.org/XyProblem
3. A Beg­inner’s Guide to Finding User Needs 2023-06-24

   tags: research, user, user-experience, user-interface

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   Qualitative research on user motivations, activities and problems.

4. Reining in the thundering herd ⛈ Getting to 80% CPU utilization with Django 2021-08-19

   tags: framework/django, gunicorn, network/http, network/http-server/haproxy, network/http-server/nginx, network/reverse-proxy, programming/python, protocol/fastcgi, uwsgi, web, wsgi

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   • https://rachelbythebay.com/w/2020/03/07/costly/
   • https://docs.gunicorn.org/en/stable/faq.html#does-gunicorn-suffer-from-the-thundering-herd-problem
   • https://uwsgi-docs.readthedocs.io/en/latest/articles/SerializingAccept.html
   • https://uwsgi-docs.readthedocs.io/en/latest/Options.html
   • https://web.archive.org/web/20160117023812/http://cramer.io/2013/06/27/serving-python-web-applications
   • https://circus.readthedocs.io/en/latest/
5. Prequel - Patch Query Language brings the descriptive power of code matching to the problem of querying a commit history 2020-01-06

   tags: commit, inria, query, source-code-management, source-code-management/git

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   • https://hal.inria.fr/hal-01330861/document
   • https://wiki.hh.se/wg211/images/a/aa/M16Lawall.pdf
6. Blaeu, creating measurements on RIPE Atlas probes 2019-04-15

   tags: internet, internet-service-provider, network, network/dns, network/ip, sysadmin

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   • https://atlas.ripe.net/
   • https://www.ripe.net/manage-ips-and-asns/resource-management/faq/independent-resources/phase-three/what-is-a-local-internet-registry-lir
   • https://labs.ripe.net/Members/stephane_bortzmeyer/using-ripe-atlas-to-debug-network-connectivity-problems
   • https://github.com/RIPE-Atlas-Community/ripe-atlas-community-contrib
   • https://www.bortzmeyer.org/dns-over-tls-atlas-measures.html
7. Racket - solve problems · make languages 2018-10-25

   tags: programming, programming/functional-programming, programming/lisp, scheme

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8. postmarketOS - a touch-optimized, pre-configured Alpine Linux that can be installed on smartphones and other mobile devices 2018-05-24

   tags: alpine, arm, linux, mobile

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   • https://wiki.postmarketos.org/wiki/Devices
   • https://postmarketos.org/blog/2017/05/26/intro/
   • https://postmarketos.org/blog/2018/04/14/lowlevel/#why-is-proprietary-cellular-firmware-a-problem-again
9. HTTPS Certificate Configuration (Version 4.x and newer) - Proxmox VE 2018-05-04

   tags: letsencrypt, network/http, network/transport-layer-security, virtualization/proxmox

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   • https://forum.proxmox.com/threads/let%E2%80%99s-encrypt-with-proxmox-ve.26842/
   • https://forum.proxmox.com/threads/certificate-startup-problems.25815/
10. Dracut emergency shell 2018-04-20

    tags: filesystem, filesystem/lvm, linux, linux/kernel

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    • https://superuser.com/questions/1244536/dracut-emerg-shell-mount-lvm2-volume
    • https://unix.stackexchange.com/questions/207593/how-to-make-lvms-at-available-boot-kernel-panic-dracut-cannot-find-logical-vo
    • https://serverfault.com/questions/893721/centos7-dracut-lvm-command-not-found
    • https://www.novell.com/coolsolutions/appnote/19386.html
    • https://fedoraproject.org/wiki/How_to_debug_Dracut_problems
    • https://kb.vmware.com/s/article/1002402
    • https://forums.fedoraforum.org/showthread.php?294909-Need-dracut-emergency-shell-help-regenerate
11. dracut(8) - Linux man page 2018-04-20

    tags: filesystem, filesystem/lvm, linux, linux/kernel

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    • https://people.redhat.com/harald/dracut.html
    • https://wiki.gentoo.org/wiki/Dracut
    • https://fedoraproject.org/wiki/How_to_debug_Dracut_problems
12. Modern PHP Without a Framework | Kevin Smith 2018-03-22

    tags: architecture, craft, development, framework, programming/php

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    • https://www.reddit.com/r/PHP/comments/85wjmu/modern_php_without_a_framework/

    "It's hard to start using frameworks if you don't understand the problems that they aim to solve."

13. How to solve 90% of NLP problems: a step-by-step guide 2018-01-29

    tags: data, machine-learning, natural-language-processing, visualization

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14. Crucial MX300 & Linux 2018-01-05

    tags: linux, sata, ssd, storage

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    • https://bbs.archlinux.org/viewtopic.php?id=173619
    • https://bbs.archlinux.org/viewtopic.php?id=218390
    • https://forums.linuxmint.com/viewtopic.php?t=247820
    • https://linux.slashdot.org/story/15/06/16/201217/trim-and-linux-tread-cautiously-and-keep-backups-handy?SetFreedomCookie
    • http://www.linuxlookup.com/review/crucial_mx300_750gb_ssd_review
    • http://forums.debian.net/viewtopic.php?f=7&t=132614

    "Problem solved - it was a compatibility issue! I returned the Crucial SSD drive last week and in its place purchased a Samsung EVO 850."

15. Chaos Engineering - O'Reilly Media 2017-08-22

    tags: chaos, cloud, distributed, infrastructure, linux, netflix, network, sysadmin

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    With so many interacting components, the number of things that can go wrong in a distributed system is enormous. You’ll never be able to prevent all possible failure modes, but you can identify many of the weaknesses in your system before they’re triggered by these events. This report introduces you to Chaos Engineering, a method of experimenting on infrastructure that lets you expose weaknesses before they become a real problem.

16. The Docker monitoring problem 2017-06-25

    tags: cloud, linux, linux/container, linux/container/docker, observability

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17. Building a DLL in Cygwin 2017-04-25

    tags: autotools, cygwin, microsoft/windows, programming/c, programming/c++, programming/library, shared

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    error: relocation truncated to fit: R_X86_64_PC32 against undefined symbol `len'

    • https://cygwin.com/ml/cygwin/2014-04/msg00058.html
    • https://stackoverflow.com/questions/10486116/what-does-this-gcc-error-relocation-truncated-to-fit-mean
    • https://www.technovelty.org/c/relocation-truncated-to-fit-wtf.html

    error: undefined symbols not allowed

    • http://www.gnu.org/software/libtool/manual/html_node/LT_005fINIT.html
    • http://stackoverflow.com/questions/17487891/libtool-undefined-symbols-not-allowedin-i686-pc-mingw32-shared#22884787

    error: undefined reference to winmain

    • http://stackoverflow.com/questions/33734016/undefined-reference-to-winmain-with-cygwin-and-cmake
    • http://stackoverflow.com/questions/13871617/winmain-and-main-in-c-extended

    Autotools:

    • https://www.sourceware.org/autobook/autobook/autobook_135.html
    • https://www.sourceware.org/autobook/autobook/autobook_136.html
    • https://sourceware.org/autobook/autobook/autobook_137.html
    • http://stackoverflow.com/questions/26151995/autotools-make-doesnt-create-dll-under-cygwin
    • https://autotools.io/libtool/windows.html

    Cygwin:

    • https://cygwin.com/cygwin-ug-net/dll.html
    • https://cygwin.com/problems.html

    General:

    • http://stackoverflow.com/questions/25105573/compile-for-windows-using-mingw-w64-and-autotools
18. Why is my email server in AT&T's blacklist? - Server Fault 2017-04-21

    tags: blocklist, email, google/mail, internet-service-provider, network, network/smtp

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    • https://luxsci.com/blog/having-problems-sending-email-because-your-isp-is-blacklisted.html
    • https://www.rackaid.com/blog/gmail-blacklist-removal/
    • https://www.rackaid.com/blog/att-blacklist-removal/
    • https://mxtoolbox.com/blacklists.aspx
    • https://www.experts-exchange.com/questions/27195977/AT-T-IP-Blacklist.html
    • https://forums.att.com/t5/2013-Archive/ATT-blacklist/td-p/2698965
19. LTTng: an open source tracing framework for Linux 2017-03-03

    tags: linux, observability/tracing, performance, programming/c, programming/python, stack

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    • https://fosdem.org/2018/schedule/event/the_lttng_approaches_to_solving_complex_problems/

    via https://www.kdab.com/slaying-latency-with-linux-kernel-tracepoints/

20. xkcd: Fixing Problems 2016-10-04

    tags: comics, development, fix, xkcd

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