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Project: Performance-Team

Switch to Active Tasks 210 Phabricator task(s).

Phabricator Link	Wiki Link	Status	Priority	Author	Assignee	Projects	Subtasks	Parent Tasks
T106116	T106116: The Doxygen version in CI parses README files as garbled C.	resolved	Low (yellow)			MediaWiki-Documentation Performance-Team (Inbox) Documentation (Automated and Inline Technical Documentation)		T232104: Sprint: Prepare MediaWiki generated docs for easier writing of Markdown and misc clean up (Sept 2019)
T107395	T107395: Remove docroot:/images/mobile in favour of docroot:/static/images/mobile	resolved	Low (yellow)			SRE (Backlog) Performance-Team (Backlog: Maintenance) Mobile (Needs triage) Patch-For-Review		T86993: Static image files from en.m.wikipedia.org are served with cache-suppressing headers
T111266	T111266: Make LoadBalancer slave lag check and read-only mode more robust (for example, using pt-heartbeat)	resolved	High (red)			Sustainability (Blocked) MW-1.27-release-notes DBA (Done) Performance-Team (Blocked (old)) MW-1.27-release (WMF-deploy-2016-04-05_(1.27.0-wmf.20)) Patch-For-Review Performance Issue	T119648: Fix getLagFromPtHeartbeat() to use the pt entry for the root master, not the immediate one	T88445: MediaWiki active/active datacenter investigation and work (tracking)
T111575	T111575: Make $wgSessionCacheType and $wgMainStash caches multi-DC ready	declined	Medium (orange)			Performance-Team (Doing (old)) Sustainability (MediaWiki-MultiDC) (Later) Epic	T134811: Consider REST with SSL (HyperSwitch/Cassandra) for session storage	T108253: Make sure CentralAuth login tokens work with two datacenters T88445: MediaWiki active/active datacenter investigation and work (tracking)
T111877	T111877: incorporate master/slave datacenter guidelines into developer docs	resolved	Medium (orange)			Documentation (Organize or Reorganize Technical Documentation) Performance-Team (Next: Goal / Oct-Dec '21) MediaWiki-General		T88666: RFC: Master/slave datacenter strategy for MediaWiki
T113204	T113204: Smart caching logic for handling cross-DC network outages	resolved	Medium (orange)			MW-1.27-release (WMF-deploy-2015-10-06_(1.27.0-wmf.2)) (Tag) MW-1.27-release (WMF-deploy-2015-10-13_(1.27.0-wmf.3)) (Backlog) Patch-For-Review Performance-Team (Doing (old)) Sustainability (Doing) MW-1.27-release-notes		T88445: MediaWiki active/active datacenter investigation and work (tracking)
T113916	T113916: Switch ResourceLoader file dependency tracking to MultiDC-friendly backend	open	High (red)			MediaWiki-ResourceLoader (Accepted Enhancement) Patch-For-Review Performance-Team (Backlog: Future Goals) Epic	T212129: Move MainStash out of Redis to a simpler multi-dc aware solution T247028: Database 'INSERT' query rate doubled (module_deps regression?) T253433: Web installer CSS fails with ServiceDisabledException T253697: Support hash-based deduplication in KeyValueDependencyStore	T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking)
T114216	T114216: Support CSV output from the WPT wrapper script	duplicate	Needs Triage (violet)			Performance-Team (Inbox)		T113649: Demonstrate impact of loading just lead sections of a group of static pages
T114273	T114273: Cleanup active-DC based MW config code and make it more robust and easy to change	resolved	High (red)			SRE (Backlog) codfw-rollout-Jan-Mar-2016 (In Progress) Patch-For-Review Performance-Team (Backlog: Maintenance) codfw-rollout (Backlog) Epic Sustainability (Tag)	T124795: codfw is in read only according to mediawiki	T88445: MediaWiki active/active datacenter investigation and work (tracking)
T116557	T116557: AFComputedVariable::compute query timeouts	resolved	High (red)			Performance-Team (Doing (old)) DBA (Backlog) Patch-For-Review AbuseFilter (Backlog) MW-1.29-release (WMF-deploy-2017-04-25_(1.29.0-wmf.21))		T163495: Mediawiki revision-related queries are failing with high rate for enwiki on codfw
T116623	T116623: Incorporate page size into load time measurements	resolved	Medium (orange)			Readers-Web-Backlog (2015-16 Q3) Performance-Team (Backlog: Maintenance)		T113066: [GOAL] Make Wikipedia more accessible to 2G connections
T119637	T119637: Update HHVM package to recent release	resolved	High (red)			Performance-Team (Doing (old)) Patch-For-Review SRE (Backlog) Performance Issue	T129467: HHVM 3.12 has a race-condition when starting up	T125084: MediaWiki monolog doesn't handle Kafka failures gracefully
T119648	T119648: Fix getLagFromPtHeartbeat() to use the pt entry for the root master, not the immediate one	resolved	Low (yellow)			Performance-Team (Doing (old)) Patch-For-Review Sustainability (Tag) MW-1.27-release (WMF-deploy-2016-01-12_(1.27.0-wmf.10)) (Backlog) Performance Issue DBA (Triage) MW-1.27-release-notes		T111266: Make LoadBalancer slave lag check and read-only mode more robust (for example, using pt-heartbeat)
T119797	T119797: Serve low-res images by default to users on slow or metered mobile connections	resolved	High (red)			MW-1.27-release (WMF-deploy-2015-12-15_(1.27.0-wmf.9)) (Backlog) MW-1.27-release (WMF-deploy-2015-11-17_(1.27.0-wmf.7)) (Backlog) Performance-Team (Next: Goal / Oct-Dec '21) Readers-Web-Backlog (2015-16 Q3) User-notice (Already announced/Archive) Reading-Admin (Feature)	T119798: Vary mobile HTML by connection speed	T113066: [GOAL] Make Wikipedia more accessible to 2G connections
T119798	T119798: Vary mobile HTML by connection speed	declined	High (red)			Varnish (Tag) Readers-Web-Backlog (2014-15 Q4) Performance-Team (Radar) Patch-For-Review	T119801: Update GeoIP cookie to include netspeed info	T119797: Serve low-res images by default to users on slow or metered mobile connections
T119801	T119801: Update GeoIP cookie to include netspeed info	declined	High (red)			Readers-Web-Backlog (Incoming) Performance-Team (Inbox) Varnish (Tag) Traffic (Triage) SRE (Backlog)		T119798: Vary mobile HTML by connection speed
T120085	T120085: RFC: Serve Main Page of Wikimedia wikis from a consistent URL	open	Medium (orange)			Editing-team (Untriaged) Performance-Team (Backlog: Future Goals) SRE (Backlog) Platform Engineering (Tracking/Watching) TechCom-RFC (P3: Explore) Wikimedia-Site-requests (Blocked on community consensus) SEO (Tag) Traffic-Icebox (Backlog) Fundraising-Backlog (Blocked or not fr-tech) Parsing-Team--ARCHIVED (Backlog) User-notice (Already announced/Archive)		T104755: Move URL-routing logic into MediaWiki
T120910	T120910: Add 2G tests for mobile on the mobile dashboard	resolved	Medium (orange)			Patch-For-Review Performance-Team (Doing (old))		T113066: [GOAL] Make Wikipedia more accessible to 2G connections
T121440	T121440: Dedicated post-edit cache busting cookie to prevent stale reads (session consistency)	resolved	Low (yellow)			Performance-Team (Doing (old))		T91820: Create HTTP verb and sticky cookie DC routing in VCL
T121558	T121558: setup kafka2001 & kafka2002	resolved	Medium (orange)			Patch-For-Review MediaWiki-Cache (Untriaged) Event-Platform (In Progress) ops-codfw (Backlog) Analytics-Kanban Performance-Team (Doing (old)) SRE (Backlog) Sustainability (Tag) DC-Ops	T120885: codfw: rack 8 new misc systems	T123954: Investigate proper set up for using Kafka MirrorMaker with new main Kafka clusters.
T122387	T122387: Log multi-DB transaction in MediaWiki	resolved	Medium (orange)			Performance-Team (Doing (old)) Sustainability (Tag) Patch-For-Review Epic MW-1.27-release-notes MW-1.27-release (WMF-deploy-2016-01-19_(1.27.0-wmf.11)) (Backlog)		T114271: Audit *all* datastores to see how DR failover is handled
T124874	T124874: Will lazy loading images make us faster on 2G?	resolved	Needs Triage (violet)			Performance-Team (Doing (old))		T124771: [SPIKE] How do we measure the impact of lazily loading images
T125138	T125138: Create Kafka event relayer subclass able to handle WAN cache and CDN purges	resolved	Medium (orange)			Patch-For-Review Sustainability (Tag) MW-1.27-release-notes MW-1.27-release (WMF-deploy-2016-04-26_(1.27.0-wmf.22)) Performance-Team (Backlog: Maintenance)		T250781: Move all purge traffic to kafka T97562: WANObjectCache relay daemon or mcrouter support
T125260	T125260: Add mobile-beta as available platform so we can measure first paint on mobile beta site	resolved	Needs Triage (violet)			NavigationTiming Mobile (Needs triage) Performance-Metrics-Dashboard (Backlog) Performance-Team (Inbox) Graphite (Inbox)		T113066: [GOAL] Make Wikipedia more accessible to 2G connections T124959: Remove `navboxes` from HTML in mobile web beta and show the impact
T127140	T127140: Spike: Investigate high TTFB for page views in mobile skin	declined	Medium (orange)			Spike Performance-Team (Backlog: Maintenance) Readers-Web-Backlog (Triaged but Future) Performance Issue		T113066: [GOAL] Make Wikipedia more accessible to 2G connections
T129093	T129093: SHOW SLAVE STATUS as a health check should have a low timeout	open	Low (yellow)			Wikimedia-Rdbms (Rdbms: MySQL support) Performance-Team (Backlog: Maintenance) DBA (Blocked external/Not db team) EngProd-Virtual-Hackathon (Backlog)	T195792: Add support for setting individual query timeout in wikimedia/rdbms
T129467	T129467: HHVM 3.12 has a race-condition when starting up	resolved	High (red)			Performance-Team (Inbox) SRE (Backlog) Performance Issue		T119637: Update HHVM package to recent release
T129973	T129973: Dig through logs from 15 Mar 2016 read-only test and file bugs	resolved	High (red)			codfw-rollout-Jan-Mar-2016 (Backlog) codfw-rollout (Backlog) SRE (Backlog) Wikimedia-production-error (Resolved) Sustainability (Tag) Release-Engineering-Team (Backlog (ARCHIVED)) Performance-Team (Next: Goal / Oct-Dec '21)		T92357: Fix database master queries from HTTP GET/HEAD before active-active multi-dc
T130946	T130946: Make ?action=markpatrolled require POST	resolved	Low (yellow)			MediaWiki-Patrolling (Backlog) MW-1.29-release (WMF-deploy-2016-11-08_(1.29.0-wmf.2)) MW-1.29-release-notes Patch-For-Review Sustainability (MediaWiki-MultiDC) (Later) Performance-Team (Doing (old))		T88445: MediaWiki active/active datacenter investigation and work (tracking)
T135027	T135027: MASTER_POS_WAIT() alternative that works cross-DC	resolved	Medium (orange)			Epic MW-1.28-release-notes Patch-For-Review Sustainability (Tag) MW-1.28-release (WMF-deploy-2016-07-19_(1.28.0-wmf.11)) DBA (Triage) Performance-Team (Doing (old))	T138778: Upgrade mariadb in deployment-prep from Precise/MariaDB 5.5 to Jessie/MariaDB 5.10 T133385: Implement GTID replication on MariaDB 10 servers	T88445: MediaWiki active/active datacenter investigation and work (tracking)
T136218	T136218: Audit mysql database class and hhvm binding support of SSL	resolved	Medium (orange)			Patch-For-Review Performance-Team (Doing (old)) Sustainability (Tag) SRE (Backlog) MW-1.28-release-notes MW-1.28-release (WMF-deploy-2016-08-30_(1.28.0-wmf.17))		T134809: Apache mariadb SSL/TLS for cross-datacenter writes
T137272	T137272: Create BagOStuff subclass for HTTP	resolved	Medium (orange)			Services (Backlog) SRE (Backlog) Sustainability (Tag) Patch-For-Review MW-1.28-release-notes Performance-Team (Radar) MW-1.28-release (WMF-deploy-2016-07-12_(1.28.0-wmf.10))		T134811: Consider REST with SSL (HyperSwitch/Cassandra) for session storage T140813: Protect sensitive user-related information with a UserData / auth / session service
T137326	T137326: Log post-send DB updates and make sure their frequency is acceptable	resolved	High (red)			MW-1.28-release (WMF-deploy-2016-06-14_(1.28.0-wmf.6)) MW-1.28-release-notes MW-1.28-release (WMF-deploy-2016-06-21_(1.28.0-wmf.7)) Patch-For-Review Performance-Team (Doing (old)) Sustainability (Tag)		T88445: MediaWiki active/active datacenter investigation and work (tracking)
T137926	T137926: Support running MediaWiki without 'curl' PHP extension	resolved	Low (yellow)			Performance-Team (Inbox) TechCom-RFC (TechCom-RFC-Closed) (Implemented) Platform Team Workboards (Clinic Duty Team) (Ready (WIP:5)) MediaWiki-Installer (General)	T202352: Convert MultiHttpClient to use Guzzle T139169: Add non-parallel MultiHttpClient fallback for environments that don't have curl available T139170: Provide warning about missing curl on Special:Version (or elsewhere)
T140664	T140664: Prepare MediaWiki for API-driven frontend	open	Medium (orange)			Performance-Team (Backlog: Future Goals) Platform Team Legacy (Watching / External) MediaWiki-Interface (Skinning system) Epic MediaWiki-General	T185782: Remove 'SkinVectorStyleModules' hook T186090: Deprecate and remove MediaWikiI18N class from Skin system T60137: Deprecate the SkinTemplateOutputPageBeforeExec hook T161278: Add default gadget styling to Parsoid's output
T143694	T143694: Preliminary Design document for A/B testing	resolved	Medium (orange)			Reading-Admin (Current Quarter) SRE (Backlog) Performance-Team (Radar) Analytics-Kanban Traffic (Caching)		T135762: A/B Testing solid framework
T144479	T144479: Ensure thumbor container access is preserved by mw filebackend setzoneaccess	resolved	High (red)			MediaWiki-Maintenance-system (Backlog) Patch-For-Review Thumbor (Backlog) MW-1.31-release-notes (WMF-deploy-2017-09-26 (1.31.0-wmf.1)) SRE (Backlog) Performance-Team (Doing (old))		T158730: Automate WMF wiki creation
T151466	T151466: Performance Q2 2017/18 goal: Install and use mcrouter in deployment-prep	resolved	Low (yellow)			Release-Engineering-Team (Watching / External) Beta-Cluster-Infrastructure (Backlog) Performance-Team (Doing (old)) Sustainability (MediaWiki-MultiDC) (Later)	T190979: build new version of mcrouter package T175418: Create new instances memc05 and memc06 running memcached	T175213: 2017/18 Annual Plan Program 8: Multi-datacenter support, Q2 goals
T157651	T157651: sql.php must not run LoadExtensionSchemaUpdates	resolved	High (red)			Performance-Team (Blocked (old)) MW-1.35-notes (1.35.0-wmf.30; 2020-04-28) MediaWiki-Maintenance-system (Backlog) Patch-For-Review Sustainability (Incident Followup) Growth-Team (Inbox) Platform Team Workboards (Clinic Duty Team) (Done) StructuredDiscussions (Backlog) Wikidata (incoming)	T249584: Call LoadExtensionSchemaUpdates later T249598: Wikibase schema updaters must not modify database directly T249599: DatabaseUpdater should not call hooks in the constructor T249603: DatabaseUpdater: protect methods for direct database modification T249683: Redefine mysql GRANTs for wikiadmin
T160813	T160813: Deprecate and remove $wgMemc in MediaWiki Core and bundled extensions	resolved	Low (yellow)			Technical-Debt (Deprecation process) (2020) Performance-Team (Blocked (old)) MW-1.36-release (To deprecate or remove) MediaWiki-General
T160985	T160985: Create an easy to deploy kill switch for every self-contained mediawiki functionality	resolved	Needs Triage (violet)			MediaWiki-General Sustainability (Incident Followup) Performance-Team (Inbox)
T161749	T161749: Introduce InterruptMutexManager	open	Lowest (sky)			Platform Team Legacy (Watching / External) Performance-Team (Backlog: Future Goals) User-Daniel (Inbox) TechCom-RFC (TechCom-RFC-Closed) (Approved) MediaWiki-General Patch-For-Review
T167331	T167331: ExtensionProcessor should prevent duplicate definitions for ResourceModuleSkinStyles	open	Medium (orange)			patch-welcome (Backlog) Sustainability (Incident Followup) Performance-Team (Backlog: Maintenance) MediaWiki-ResourceLoader (Accepted Enhancement) MediaWiki-Configuration (Backlog)
T171071	T171071: Perform testing for TLS effect on connection rate	resolved	Medium (orange)			Sustainability (MediaWiki-MultiDC) (Discuss next) SRE (Backlog) Performance-Team (Doing (old)) DBA (Blocked external/Not db team) Patch-For-Review	T175672: Make apache/maintenance hosts TLS connections to mariadb work	T134809: Apache mariadb SSL/TLS for cross-datacenter writes
T176916	T176916: Set up sampling profiler for PHP 7 (alternative to HHVM Xenon)	resolved	High (red)			Platform Engineering (PHP7 (TEC4)) Platform Team Workboards (Done with CPT) Performance-Team (Doing (old)) PHP 7.1 support (Wikimedia production)	T205059: Excimer: new profiler for PHP	T176370: Migrate to PHP 7 in WMF production
T179760	T179760: File metadata gets refreshed when accessing the file description page	resolved	Medium (orange)			Patch-For-Review Commons (Incoming) MW-1.33-notes (1.33.0-wmf.24; 2019-04-02) Multimedia (Triaged) MediaWiki-File-management (Backlog) Performance-Team (Inbox)		T92357: Fix database master queries from HTTP GET/HEAD before active-active multi-dc
T181385	T181385: Wikidata entity dumpers stuck with 100% CPU on snapshot1007	resolved	High (red)			Wikidata (incoming) MW-1.31-release-notes (WMF-deploy-2018-01-02 (1.31.0-wmf.15)) Datasets-General-or-Unknown (Done) Performance-Team (Blocked (old))		T88991: improve Wikidata dumps [tracking]
T184527	T184527: Test performance win with lazy references on a real mobile phone	resolved	Medium (orange)			Performance-Team (Next: Goal / Oct-Dec '21)	T184681: Document how to run performance tests on real phones	T123328: [GOAL] Lazy load references in mobile skin
T184681	T184681: Document how to run performance tests on real phones	resolved	Medium (orange)			Documentation (New Technical Documentation Request) Mobile (Triaged) Performance-Team (Blocked (old)) Readers-Web-Backlog (Tracking) (Untag)		T184527: Test performance win with lazy references on a real mobile phone
T186090	T186090: Deprecate and remove MediaWikiI18N class from Skin system	resolved	Medium (orange)			MediaWiki-HTML-Templating MediaWiki-Interface (Backlog) MW-1.32-release (Backlog) Performance-Team (Inbox)		T140664: Prepare MediaWiki for API-driven frontend
T187154	T187154: Performance regression from Apcu/ExtensionRegistry::loadFromQueue on PHP7	resolved	High (red)			MediaWiki-Configuration (Backlog) PHP 7.2 support (MediaWiki core) Performance-Team (Doing (old))	T220994: Add ExtensionRegistry::getLazyLoadedAttribute() T236800: Ensure apcu incr/decr are atomic (Upgrade php-apcu) T247265: Export extension.json "ResourceModules" as attribute instead of config
T189629	T189629: rename role::xenon	resolved	Medium (orange)			Platform Team Legacy (Watching / External) SRE (Acknowledged) Services (watching) Performance-Team (Inbox) Arc-Lamp
T189966	T189966: Audit and simplify MediaWiki initialisation code (Spring 2018)	resolved	Medium (orange)			Performance-Team-publish (Misc bookmarks) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) MediaWiki-General Performance-Team (Blocked (old)) MW-1.35-notes (1.35.0-wmf.31; 2020-05-05)	T202017: Remove indirection of TimedMediaHandler module registration T201782: Remove use of StartProfiler.php in wmf production T233886: Gain telemetry on MW init T243175: Deprecate and remove $messageMemc T247674: Remove $wgContLanguageCode
T191668	T191668: Define varargs in \IDatabase::buildLike() in a way phan can understand it	resolved	High (red)			MW-1.35-notes (1.35.0-wmf.1; 2019-10-08) Wikimedia-production-error (ARCHIVED -- Shared Build Failure) (In progress) phan (Backlog) Wikimedia-Rdbms (Rdbms library) MW-1.33-notes Patch-For-Review Performance-Team (Blocked (old))
T193565	T193565: Foreign query for metawiki fails with "Table 'centralauth.page' doesn't exist" (DBConnRef mixup?)	open	Medium (orange)			Sustainability (Incident Followup) Wikimedia-Rdbms (Rdbms library) Patch-For-Review Performance-Team (Doing: Prio Interrupt) Wikimedia-production-error (Older)	T269326: Create RequestTimeout library
T194225	T194225: Enable mcrouter on the memcached servers themselves	duplicate	Medium (orange)			Patch-For-Review Performance-Team (Doing (old))		T97562: WANObjectCache relay daemon or mcrouter support
T196125	T196125: php-memcached 3.0 (PHP 7) incompatible with BagOStuff	resolved	Medium (orange)			MW-1.31-release-notes MW-1.27-release-notes MW-1.32-notes (WMF-deploy-2018-06-05 (1.32.0-wmf.7)) MW-1.30-release-notes Performance-Team (Doing (old)) SRE (Backlog) MW-1.31-release (Core) PHP 7.0 support (Backlog) MediaWiki-Platform-Team (Closed) MW-1.29-release-notes		T176370: Migrate to PHP 7 in WMF production
T196923	T196923: CSP Report: Triggered by mediawiki.js's domEval() function in Chrome and Safari (but not Firefox)	resolved	Medium (orange)			MW-1.32-notes (WMF-deploy-2018-08-07 (1.32.0-wmf.16)) Security-Team (Our Part Is Done) Performance-Team (Doing (old)) Core-Platform-Team-Old (Closed) Patch-For-Review MediaWiki-ResourceLoader (Backlog)		T135963: Add support for Content-Security-Policy (CSP) headers in MediaWiki
T200703	T200703: Special:RandomInCategory does not return all pages with equal probability	open	Needs Triage (violet)			MediaWiki-extensions-RandomInCategory Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) Wikimedia-Rdbms (Rdbms library) MediaWiki-Categories (Backlog) Patch-For-Review Performance-Team (Inbox)
T201782	T201782: Remove use of StartProfiler.php in wmf production	resolved	Medium (orange)			Patch-For-Review Performance-Team (Next: Goal / Oct-Dec '21) Technical-Debt (Deprecation process) (2018)		T189966: Audit and simplify MediaWiki initialisation code (Spring 2018)
T202017	T202017: Remove indirection of TimedMediaHandler module registration	resolved	Medium (orange)			TimedMediaHandler (To sort) Performance-Team (Inbox) MW-1.32-notes (WMF-deploy-2018-08-21 (1.32.0-wmf.18))		T189966: Audit and simplify MediaWiki initialisation code (Spring 2018)
T202087	T202087: TemplateData emits count() parameter warning on PHP7.2	resolved	High (red)			TemplateData (Backlog) MW-1.32-notes (WMF-deploy-2018-10-16 (1.32.0-wmf.26)) PHP 7.2 support (Wikimedia production) Performance-Team (Inbox) VisualEditor (To Triage) User-Ryasmeen (To be Verified) Patch-For-Review		T204884: Run MediaWiki tests on PHP 7.3
T203925	T203925: Save times for changes to translation variable text in centralnotice paralysingly slow	resolved	High (red)			Platform Engineering (Needs Cleaning - Security, stability, performance, and scalability (TEC1)) Language-Team (Backlog) Fundraising Sprint USB stands for underhanded socket bureaucracy (Pending Deployment) MediaWiki-extensions-Translate (Backlog) Fundraising Sprint Vestigial tails shoot from the hip (Backlog) Fundraising Sprint Sasquatches can't find us either (Doing) Platform Team Workboards (Done with CPT) Performance-Team-publish (Consider write up) Fundraising Sprint Raw data can give you salmonella (Backlog) Fundraising Sprint They Live (Pending Deployment) Performance-Team (Doing (old)) MediaWiki-extensions-CentralNotice (Backlog) Fundraising-Backlog (Current Sprint)
T203935	T203935: Support Save-Data header	declined	Needs Triage (violet)			MobileFrontend (Backlog) Platform Team Legacy (Watching / External) Performance-Team (Backlog: Maintenance) Readers-Web-Backlog (Tracking) (Untriaged) Product-Infrastructure-Team-Backlog (Tracking)
T205369	T205369: Investigate > 40% Save Timing regression (2018-09-05)	resolved	High (red)			Multi-Content-Revisions (Done) Performance-Team (Doing (old)) Platform Team Initiatives (MCR) Platform Team Workboards (Done with CPT) Performance-Team-publish (Consider write up)
T205893	T205893: Automatically trigger waitForReplication after a sufficiently high number of rows has been written	resolved	Needs Triage (violet)			Performance-Team (Inbox) Platform Engineering (Inbox) Wikimedia-Rdbms (Rdbms library) Sustainability (Incident Followup)
T206152	T206152: Set up request debug profiling for PHP 7	resolved	Medium (orange)			SRE (Acknowledged) MediaWiki-Debug-Logger Performance-Team (Doing (old))		T176370: Migrate to PHP 7 in WMF production
T206283	T206283: Failed deferred updates should be queued as jobs if possible (Deadlock from LinksUpdate in WikiPage::updateCategoryCounts)	resolved	Medium (orange)			MW-1.35-notes (1.35.0-wmf.24; 2020-03-17) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) Performance-Team (Backlog: Maintenance) Wikimedia-production-error (Older) MediaWiki-Page-derived-data
T207054	T207054: Some Commons pages fatal with IncompleteRevisionException: "Uninitialized field: content_address"	resolved	Needs Triage (violet)			Platform Team Initiatives (MCR) Performance-Team (Inbox) Wikimedia-production-error (Untriaged) Platform Team Workboards (Done with CPT) Multi-Content-Revisions (Done) MediaWiki-ResourceLoader (External)
T207809	T207809: PHP error "CdnPurgeJob never inserted."	resolved	Medium (orange)			MW-1.33-notes (1.33.0-wmf.2; 2018-10-30) Performance-Team (Doing (old)) Wikimedia-production-error (Resolved) MW-1.32-notes (Backlog) Platform Team Legacy (Watching / External) Services (watching) MediaWiki-Cache (HTTP Cache) WMF-JobQueue (Untriaged)
T211488	T211488: Audit and sync INI settings as needed between HHVM and PHP 7	resolved	Medium (orange)			SRE (Acknowledged) PHP 7.2 support (Wikimedia production) User-jijiki (Inbox 🐅) Performance-Team (Inbox)	T220681: Set `enable_dl` to 0 in php.ini	T176370: Migrate to PHP 7 in WMF production T215126: PHP warning on some Echo email sending attempts due to mismatching PEAR file versions
T211906	T211906: Expose PHP7/HHVM to NavTiming in a header, send with navtiming beacon so we can use it as a dimension	resolved	High (red)			Performance-Team (Doing (old)) NavigationTiming Patch-For-Review MW-1.34-notes (1.34.0-wmf.10; 2019-06-18)		T176370: Migrate to PHP 7 in WMF production
T212129	T212129: Move MainStash out of Redis to a simpler multi-dc aware solution	open	Medium (orange)			SRE (Acknowledged) Performance-Team (Backlog: Future Goals) User-mobrovac (Backlog) MediaWiki-General User-jijiki (St) Patch-For-Review serviceops (serviceops-radar) (Watched) Sustainability (MediaWiki-MultiDC) (Current: Performance Team)	T222851: Improve Echo seentime code for multi-DC access T229062: Look into a simple way to have global keys with db-replicated T254634: Determine and implement multi-dc strategy for ChronologyProtector T267270: Determine multi-dc strategy for CentralAuth T269324: Productionize x2 databases T274174: Add modtoken field and flags to objectcache table	T113916: Switch ResourceLoader file dependency tracking to MultiDC-friendly backend T243520: Decommission the "session redis" cluster T267581: Phasing out "redis_sessions" MediaWiki cluster and away from the memcached cluster T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking) T88445: MediaWiki active/active datacenter investigation and work (tracking)
T212881	T212881: addWiki.php broken creating ES tables	resolved	High (red)			Patch-For-Review MW-1.34-notes (1.34.0-wmf.24; 2019-09-24) MediaWiki-extensions-WikimediaMaintenance (Backlog) Performance-Team (Doing (old))
T215611	T215611: MediaWiki errors overloading logstash	resolved	High (red)			Wikimedia-Logstash (In Dev/Progress) SRE (Backlog) Wikimedia-production-error (Resolved) Performance-Team (Blocked (old)) observability (Inbox) Platform Engineering (Needs Cleaning - Security, stability, performance, and scalability (TEC1)) Platform Team Workboards (Done with CPT) Wikimedia-Rdbms (Untriaged)
T215746	T215746: Checkup on cssjanus PHP 7 compat	resolved	High (red)			PHP 7.2 support (MediaWiki core) PHP 7.0 support (MediaWiki core) Performance-Team (Doing (old)) MediaWiki-ResourceLoader (Confirmed Problem) MW-1.34-notes (1.34.0-wmf.4; 2019-05-07)		T176370: Migrate to PHP 7 in WMF production
T216496	T216496: Misleading "replica catching up" error when master DB is down	resolved	Low (yellow)			Performance-Team (Doing (old)) Wikimedia-Rdbms (Rdbms library) MW-1.34-notes (1.34.0-wmf.20; 2019-08-27) patch-welcome (Backlog) Patch-For-Review
T216744	T216744: libpcre-related performance opportunities	open	Needs Triage (violet)			MediaWiki-General Performance-Team (Backlog: Future Goals)
T218170	T218170: Finish removal of ukwikimedia wiki	resolved	Low (yellow)			Performance-Team (Inbox) WMF-JobQueue (Meta) Wikimedia-production-error (Sep2019/1.34.wmf.21+)
T218692	T218692: read only on mediawiki generates "LoadBalancer.php: Cannot access the database: Unknown error"	resolved	Medium (orange)			WMF-JobQueue (Core) Platform Team Legacy (Watching / External) Performance-Team (Backlog: Maintenance) Wikimedia-Rdbms (Rdbms library) DBA (Blocked external/Not db team) Sustainability (Incident Followup)
T218918	T218918: Some interface messages (e.g. sitenotice, others) are loading old revisions of their messages	resolved	Unbreak Now! (pink)			I18n (Untriaged) Multi-Content-Revisions (Done) Performance-Team (Inbox) MediaWiki-Internationalization (Backlog) Patch-For-Review MediaWiki-Cache (Untriaged) MW-1.33-notes (1.33.0-wmf.23; 2019-03-26) Platform Team Initiatives (MCR) User-notice (Already announced/Archive) Platform Team Workboards (Done with CPT)	T219042: Flaky test MessageCacheTest::testLoadFromDB_fetchLatestRevision
T221368	T221368: cdnPurge and other jobs fail completely to execute	resolved	Unbreak Now! (pink)			Wikimedia-production-error (Apr 2019 / 1.33.wmf.25+) MediaWiki-Core-JobQueue Platform Engineering (Needs Cleaning - Security, stability, performance, and scalability (TEC1)) WMF-JobQueue (Untriaged) Platform Team Workboards (Done with CPT) MW-1.34-notes (1.34.0-wmf.3; 2019-04-30) Performance-Team (Inbox) Services (done)
T223933	T223933: Database error when moving pages: LinksUpdate::updateCategoryCounts does not have outer scope.	duplicate	Medium (orange)			Wikimedia-Rdbms (Untriaged) Wikimedia-production-error (May 2019 / 1.34.wmf.5+) Platform Engineering (Needs Cleaning - Security, stability, performance, and scalability (TEC1)) Platform Team Workboards (Done with CPT) Performance-Team (Inbox) User-DannyS712 (Otherwise closed)
T224419	T224419: Allow MediaWiki to know the "real" DB master	open	Medium (orange)			Wikimedia-Rdbms (Rdbms library) Platform Team Initiatives (Multi-DC (TEC1)) Services (watching) Performance-Team (Backlog: Future Goals)		T221159: FY18/19 TEC1.6 Q4: Improve or replace the usage of GTID_WAIT with pt-heartbeat in MW
T224422	T224422: Implement logic to filter bogus GTIDs	resolved	High (red)			Performance-Team (Inbox) Services (watching) Wikimedia-Rdbms (Rdbms: MySQL support) MW-1.34-notes (1.34.0-wmf.25; 2019-10-01) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) Platform Team Initiatives (Multi-DC (TEC1)) MW-1.35-notes (1.35.0-wmf.2; 2019-10-15)		T221159: FY18/19 TEC1.6 Q4: Improve or replace the usage of GTID_WAIT with pt-heartbeat in MW
T226785	T226785: Phase out use of vary-revision with more specific flags and improve related logging	resolved	High (red)			MW-1.34-notes (1.34.0-wmf.20; 2019-08-27) MediaWiki-Parser (Backlog) Performance-Team (Blocked (old)) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed)
T227376	T227376: Move callers away from getMainObjectStash() that do not need it	open	Medium (orange)			Sustainability (MediaWiki-MultiDC) (Later) Platform Team Workboards (External Code Reviews) (External Code Review Needed) Patch-For-Review WMF-General-or-Unknown Performance-Team (Backlog: Maintenance)	T236414: CPT review/work for MediaWiki caching class maintenance ramp-up
T228525	T228525: If JobQueueEventBus fails to send a job exception is left uncaught	invalid	Needs Triage (violet)			Performance-Team (Inbox) WMF-JobQueue (Untriaged) Wikimedia-production-error (Jul2019/1.34.wmf.13+) Platform Engineering (Needs Cleaning - Security, stability, performance, and scalability (TEC1)) Platform Team Workboards (Clinic Duty Team) (Done)
T228876	T228876: Some interface messages are default messages instead of local overrides for language variants on Chinese Wikivoyage	invalid	Low (yellow)			Chinese-Sites (Closed) Performance-Team (Inbox) Platform Engineering (Icebox) MediaWiki-Internationalization (Backlog) MediaWiki-Cache (MessageCache) Language-Team (Backlog)	T229992: Locally created fallback should take precedent over config fallback
T228895	T228895: 3% of load.php spent creating DBLoadBalancerFactory in WebStart.php	open	High (red)			Patch-For-Review Performance-Team (Backlog: Future Goals) MW-1.35-notes (1.35.0-wmf.25; 2020-03-24) MW-1.37-notes (1.37.0-wmf.4; 2021-05-04) Wikimedia-Rdbms (Wiring for MediaWiki)
T229062	T229062: Look into a simple way to have global keys with db-replicated	resolved	Medium (orange)			MediaWiki-Cache (libs/objectcache) MW-1.35-notes (1.35.0-wmf.34; 2020-05-26) Performance-Team (Blocked (old))		T212129: Move MainStash out of Redis to a simpler multi-dc aware solution
T229266	T229266: Language::uc/lc return type correctness and perf review	resolved	Needs Triage (violet)			Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) Performance-Team (Doing (old)) MediaWiki-Internationalization (Backlog) MW-1.35-notes (1.35.0-wmf.3; 2019-10-22)
T229577	T229577: Remove e.timeStamp from mw.trackSubscribe interface	resolved	Low (yellow)			MW-1.35-notes (1.35.0-wmf.19; 2020-02-11) MediaWiki-ResourceLoader (Accepted Enhancement) Performance-Team (Blocked (old)) Platform Team Workboards (Clinic Duty Team) (Waiting for Review)
T229694	T229694: Warning: EchoModerationController::moderate: transaction round 'MWCallableUpdate::doUpdate' still running	resolved	Medium (orange)			Performance-Team (Blocked (old)) MediaWiki-General MW-1.34-notes (1.34.0-wmf.20; 2019-08-27) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) Regression
T230025	T230025: Create HtmlCacheUpdater service class to normalize purging code	resolved	Medium (orange)			MediaWiki-Page-derived-data Platform Team Workboards (Clinic Duty Team) (External Code Review In Progress) MW-1.35-notes (1.35.0-wmf.28; 2020-04-14) User-Daniel (Inbox) Performance-Team (Doing (old))
T230065	T230065: DBQueryError "Commands out of sync" from Rdbms\Database::close	resolved	Medium (orange)			Wikimedia-Rdbms (Rdbms library) MW-1.34-notes (1.34.0-wmf.20; 2019-08-27) Performance-Team (Doing (old)) Wikimedia-production-error (Aug2019/1.34.wmf.17+)
T230245	T230245: Make SwiftFileBackend::doStoreInternal defer the opening of file handles to stay in the concurrency limit	open	Medium (orange)			SRE-swift-storage (Inbox) Platform Engineering (Icebox) SRE (Backlog) Commons (Incoming) ConfirmEdit (CAPTCHA extension) (Backlog) Editing-team (Freezer) Patch-For-Review MediaWiki-File-management (Backlog) Performance-Team (Backlog: Maintenance)
T230897	T230897: Measure the impact of native image lazy loading on desktop	resolved	Lowest (sky)			MW-1.34-notes (1.34.0-wmf.20; 2019-08-27) Platform Team Workboards (Clinic Duty Team) (Done) Performance-Team (Backlog: Maintenance)
T231160	T231160: HtmlFormatter incorrectly removes partial classname matches in "xenomobile" or "not-an-navbox"	resolved	High (red)			CSS (Backlog) Performance-Team (Blocked (old)) Readers-Web-Backlog (Kanbanana-FY-2020-21) (Ready for Signoff) Patch-For-Review MW-1.36-notes (1.36.0-wmf.4; 2020-08-11) HtmlFormatter
T231162	T231162: DBQueryError from ExternalStoreDB::fetchBlob: Table 'enwiki.blobs' doesn't exist	resolved	Low (yellow)			MW-1.34-notes (1.34.0-wmf.22; 2019-09-10) Performance-Team (Doing (old)) Platform Team Workboards (Clinic Duty Team) (External Code Review Completed) MediaWiki-Revision-backend (ExternalStore)

... further results