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Project: Performance-Team

Switch to All Tasks 42 Phabricator task(s).

Phabricator Link	Wiki Link	Status	Priority	Author	Assignee	Projects	Subtasks	Parent Tasks
T113916	T113916: Switch ResourceLoader file dependency tracking to MultiDC-friendly backend	open	High (red)	Krinkle (Timo Tijhof)	aaron (Aaron Schulz)	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)
T120085	T120085: RFC: Serve Main Page of Wikimedia wikis from a consistent URL	open	Medium (orange)	Krinkle (Timo Tijhof)		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
T129093	T129093: SHOW SLAVE STATUS as a health check should have a low timeout	open	Low (yellow)	jcrespo (Jaime Crespo)		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
T140664	T140664: Prepare MediaWiki for API-driven frontend	open	Medium (orange)	Krinkle (Timo Tijhof)		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
T161749	T161749: Introduce InterruptMutexManager	open	Lowest (sky)	Krinkle (Timo Tijhof)		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)	Jdforrester-WMF (James D. Forrester)		patch-welcome (Backlog) Sustainability (Incident Followup) Performance-Team (Backlog: Maintenance) MediaWiki-ResourceLoader (Accepted Enhancement) MediaWiki-Configuration (Backlog)
T193565	T193565: Foreign query for metawiki fails with "Table 'centralauth.page' doesn't exist" (DBConnRef mixup?)	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Sustainability (Incident Followup) Wikimedia-Rdbms (Rdbms library) Patch-For-Review Performance-Team (Doing: Prio Interrupt) Wikimedia-production-error (Older)	T269326: Create RequestTimeout library
T200703	T200703: Special:RandomInCategory does not return all pages with equal probability	open	Needs Triage (violet)	DerHexer (DerHexer)		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)
T212129	T212129: Move MainStash out of Redis to a simpler multi-dc aware solution	open	Medium (orange)	Joe (Giuseppe Lavagetto)	aaron (Aaron Schulz)	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)
T216744	T216744: libpcre-related performance opportunities	open	Needs Triage (violet)	ori (Ori Livneh)		MediaWiki-General Performance-Team (Backlog: Future Goals)
T224419	T224419: Allow MediaWiki to know the "real" DB master	open	Medium (orange)	mobrovac (Marko Obrovac)		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
T227376	T227376: Move callers away from getMainObjectStash() that do not need it	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	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
T228895	T228895: 3% of load.php spent creating DBLoadBalancerFactory in WebStart.php	open	High (red)	Krinkle (Timo Tijhof)		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)
T230245	T230245: Make SwiftFileBackend::doStoreInternal defer the opening of file handles to stay in the concurrency limit	open	Medium (orange)	Dzahn (Daniel Zahn)	aaron (Aaron Schulz)	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)
T232673	T232673: Performance review: Sharable section links	stalled	Medium (orange)	Krinkle (Timo Tijhof)		Performance-Team (Backlog: Future Goals)		T18691: RFC: Section header "share" link
T234455	T234455: Decouple simple Memcached interface and support pipelined operations without dependency on PECL	open	Needs Triage (violet)	Krinkle (Timo Tijhof)		MediaWiki-Cache (libs/objectcache) Patch-For-Review Performance-Team (Backlog: Future Goals) Platform Team Workboards (External Code Reviews) (External Code Review Completed)
T234514	T234514: Slow IndexPager::buildQueryInfo query on enwiki for the special slaves	open	Needs Triage (violet)	Marostegui (Manuel Aróstegui)		Performance-Team (Inbox) Core Platform Team (Inbox)
T236412	T236412: Refactor BagOStuff to use a more storage/multi-DC aware interface hierarchy	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	MW-1.35-notes (1.35.0-wmf.23; 2020-03-10) Performance-Team (Backlog: Future Goals) MediaWiki-Cache (libs/objectcache) Platform Engineering Roadmap Decision Making (Icebox) Patch-For-Review
T240626	T240626: Performance review of client-side-only version of Graph extension	stalled	Medium (orange)	MarkTraceur (MarkTraceur)		MediaWiki-extensions-Graph (Backlog) Performance-Team (Backlog: Future Goals)	T256638: Instrumentation of client side graph performance T256642: Cache clientside json for graph	T242855: Undeploy graphoid
T247383	T247383: Clearly document ExternalStore as append-only interface (with rationale)	open	Medium (orange)	Krinkle (Timo Tijhof)	Krinkle (Timo Tijhof)	Platform Engineering (Icebox) MediaWiki-Revision-backend (Untriaged) MW-1.38-notes (1.38.0-wmf.16; 2022-01-03) Performance-Team (Backlog: Maintenance)
T255493	T255493: Consider phasing out ILoadBalancer::getConnectionRef in favour of ILoadBalancer::getLazyConnectionRef	open	Needs Triage (violet)	Krinkle (Timo Tijhof)		Developer Productivity Wikimedia-Rdbms (Rdbms library) Platform Engineering Roadmap Decision Making (Icebox) Performance-Team (Backlog: Maintenance)
T256432	T256432: Performance review of WebAuthn extension	open	Medium (orange)	Krinkle (Timo Tijhof)		MW-1.35-notes (1.35.0-wmf.39; 2020-06-30) MediaWiki-extensions-OATHAuth (Backlog) Performance-Team (Backlog: Future Goals) Platform Engineering Roadmap Decision Making (Untriaged)
T265386	T265386: Rewrite LoadMonitor to better handle cache regeneration and improve separation of concern	open	Lowest (sky)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Wikimedia-Rdbms (Rdbms library) Performance-Team (Backlog: Maintenance) Patch-For-Review
T269161	T269161: Disallow direct "BEGIN"/"COMMIT"/"ROLLBACK" via Database::query()	open	Lowest (sky)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Platform Engineering (Tracking/Watching) Wikimedia-Rdbms (Rdbms library) Performance-Team (Backlog: Maintenance)
T270223	T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking)	open	High (red)	Krinkle (Timo Tijhof)	Krinkle (Timo Tijhof)	Epic Performance-Team (Backlog: Future Goals)	T212129: Move MainStash out of Redis to a simpler multi-dc aware solution T91820: Create HTTP verb and sticky cookie DC routing in VCL T254634: Determine and implement multi-dc strategy for ChronologyProtector T267270: Determine multi-dc strategy for CentralAuth T270225: Finish session storage to actually meet multi-DC requirements T113916: Switch ResourceLoader file dependency tracking to MultiDC-friendly backend T279664: Decide on details of progressive Multi-DC roll out T277831: Evaluate WMF's ParserCache database setup for Multi DC	T88445: MediaWiki active/active datacenter investigation and work (tracking)
T274618	T274618: Return actual integers when selecting integer fields from the DB	open	Low (yellow)	tstarling (Tim Starling)		MediaWiki-General Wikimedia-Rdbms (Rdbms library) Performance-Team (Backlog: Future Goals) Platform Team Workboards (Clinic Duty Team) (Later)
T275713	T275713: Misc ChronologyProtector follow-up (Feb 2021)	open	Needs Triage (violet)	Krinkle (Timo Tijhof)		Platform Engineering (Tracking/Watching) Performance-Team (Backlog: Future Goals) Wikimedia-Rdbms (Rdbms library)
T277831	T277831: Evaluate WMF's ParserCache database setup for Multi DC	open	Medium (orange)	Krinkle (Timo Tijhof)	Krinkle (Timo Tijhof)	Performance-Team (Backlog: Future Goals) DBA (Backlog)	T133523: Decide how to improve parsercache replication, sharding and HA	T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking)
T278392	T278392: Storage solution for cross-datacenter tokens	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Patch-For-Review MediaWiki-extensions-OAuth (Backlog) Performance-Team (Next: Goal / Oct-Dec '21) MediaWiki-extensions-CentralAuth (Incoming) ConfirmEdit (CAPTCHA extension) (Backlog) Sustainability (MediaWiki-MultiDC) (Later)		T267270: Determine multi-dc strategy for CentralAuth
T279205	T279205: Harden and improve HTTP cache headers and purging in MediaWiki core (Sprint placeholder)	open	Needs Triage (violet)	Krinkle (Timo Tijhof)		Platform Engineering Roadmap Decision Making (Untriaged) Performance-Team (Backlog: Future Goals) MediaWiki-Cache (HTTP Cache)
T279664	T279664: Decide on details of progressive Multi-DC roll out	open	Medium (orange)	Krinkle (Timo Tijhof)	Krinkle (Timo Tijhof)	Traffic (Radar) SRE (Backlog) Performance-Team (Backlog: Future Goals) serviceops (Incoming 🐫)		T270223: FY2021-2022: Enable basic Multi-DC operations for read traffic (tracking)
T281451	T281451: Wikimedia\Rdbms\DBTransactionError: Transaction round stage must be 'cursory' (not 'within-rollback-callbacks')	open	Medium (orange)	LarsWirzenius (Lars Wirzenius)	aaron (Aaron Schulz)	Patch-For-Review Performance-Team (Doing: Prio Interrupt) Wikimedia-production-error (Apr 2021) MW-1.38-notes (1.38.0-wmf.7; 2021-11-02) Wikimedia-Rdbms (Rdbms library) Platform Team Workboards (Clinic Duty Team) (Later)	T297424: Reduce LBFactory::rollbackPrimaryChanges() callers in core
T283029	T283029: FlaggableWikiPage::preloadPreparedEdit() does not actually carry over the parser output, leading to double parses on save	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	MediaWiki-Page-derived-data Platform Engineering (Tracking/Watching) MediaWiki-extensions-FlaggedRevs (Backlog) Performance-Team (Backlog: Maintenance)
T290831	T290831: Unspecified fatal error when loading a particular diff on ckbwiki	open	High (red)	Harej (James Hare)		Performance-Team (Inbox) Platform Engineering (Inbox) MediaWiki-Parser (Backlog) Wikimedia-production-error (Untriaged)
T293928	T293928: Hard deprecate and remove wfGetCache() and wfGetMainCache()	open	Needs Triage (violet)	Zabe		Technical-Debt (Deprecation process) (Untriaged) MediaWiki-Cache (Untriaged) Performance-Team (Backlog: Maintenance) MW-1.38-notes (1.38.0-wmf.17; 2022-01-10) Patch-For-Review		T115890: Reduce and clarify ObjectCache entry points
T294969	T294969: Deprecate and remove Database::lockTables and Database::unlockTables	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Wikimedia-Rdbms (Rdbms library) Performance-Team (Backlog: Maintenance) MW-1.38-notes (1.38.0-wmf.17; 2022-01-10) Patch-For-Review
T297424	T297424: Reduce LBFactory::rollbackPrimaryChanges() callers in core	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Wikimedia-Rdbms (Wiring for MediaWiki) Performance-Team (Doing: Prio Interrupt) Platform Engineering (Inbox) Patch-For-Review		T281451: Wikimedia\Rdbms\DBTransactionError: Transaction round stage must be 'cursory' (not 'within-rollback-callbacks')
T298485	T298485: MW scripts should reload the database config	open	Medium (orange)	Marostegui (Manuel Aróstegui)	Ladsgroup (Amir Sarabadani)	MediaWiki-Maintenance-system (Backlog) DBA (Ready) User-Ladsgroup (Incoming) Performance-Team (Inbox)
T298687	T298687: Query caller comments /* Class::method */ not available in slow queries logstash dashboard	open	Medium (orange)	Lucas_Werkmeister_WMDE (Lucas Werkmeister (WMDE))	Ladsgroup (Amir Sarabadani)	Performance-Team (Backlog: Maintenance) Developer Productivity Wikimedia-Rdbms (Rdbms library) DBA (In progress) User-Ladsgroup (Incoming)
T298876	T298876: x1 cannot be set to read only on MW	open	Medium (orange)	Marostegui (Manuel Aróstegui)	Krinkle (Timo Tijhof)	Wikimedia-Rdbms (Untriaged) Data-Persistence (Inbox) Platform Engineering (Inbox) Performance-Team (Doing: Prio Interrupt)
T50835	T50835: Separate Cache-Control header for proxy and client	open	Medium (orange)	tstarling (Tim Starling)		SRE (Acknowledged) Performance-Team (Backlog: Future Goals) MediaWiki-Cache (HTTP Cache) Traffic-Icebox (Backlog) Platform Engineering (Tracking/Watching)
T92357	T92357: Fix database master queries from HTTP GET/HEAD before active-active multi-dc	open	Medium (orange)	aaron (Aaron Schulz)	aaron (Aaron Schulz)	Sustainability (MediaWiki-MultiDC) (Later) Performance-Team (Backlog: Maintenance) MediaWiki-General	T216287: BannerMessageGroup::registerGroupHook of CentralNotice must not query master on GET request (page views) T154795: CheckUser opens DB master connection when email is sent T154719: PageTriage opens master connection on GET for ArticleMetadata cache misses T154556: Babel autocreates category and system user on GET T154554: AbuseFilter "Examine past edits" feature opens master conn on GET in certain cases involving Scribunto T135170: Require POST in ?action=purge T129973: Dig through logs from 15 Mar 2016 read-only test and file bugs T103429: Investigation: Parser save hook handler does master writes in GETs T95753: Translate extensions uses the master a lot on page views T188801: Migrate wl_notificationtimestamp updates to the job queue T179760: File metadata gets refreshed when accessing the file description page T154596: SpecialModifyEntity master queries on page views T154555: Special:SetSiteLink, other SpecialModifyEntity subclasses open master connection on GET T136224: OATHAuth doing DB master queries on HTTP GET T134842: SpecialCentralAutoLogin calls User::saveSettings() on HTTP GET presend T134841: MessageGroupStats::queueUpdates trigger on page views T134608: CentralAuth uses master on POST requests for API/specialpages that return false for doesWrites() T133422: DB master queries for entities on parse T122708: ShortUrl must not write to master db on page views (DBPerformance warning) T119689: Enable $wgCentralAuthUseSlaves to avoid master queries T110399: WikiPageEntityMetaDataLookup querying DB master on HTTP GET T95232: High frequency of master queries on GET requests due to Flow T95156: Wikidata needlessly queries master DB to populate deprecated wbUserIsBlocked JS variable T94030: Avoid opening master db connection on special pages (e.g. Special:NewItem) when not needed T151903: Special:Search performs DB writes on GET request	T88445: MediaWiki active/active datacenter investigation and work (tracking)