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Text of the page (random words):
help job queue wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 updating links tables when a template changes 2 html cache invalidation 3 typical values 4 see also 5 references toggle the table of contents help job queue add languages add links help page talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons mediawiki wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia wikipedia information page for mediawiki job queue wp queue redirects here for the did you know queue see template did you know queue wikipedia information page this is an information page it is not a wikipedia policy or guideline rather its purpose is to explain certain aspects of wikipedia s norms or practices it may reflect varying levels of consensus shortcut wp jq wp jq in mediawiki 1 6 released in 2006 a job queue was introduced to perform long running tasks asynchronously the job queue is designed to hold many short tasks using batch processing updating links tables when a template changes edit mediawiki 1 6 adds a job to the job queue for each article using a template each job is a command to read an article expand any templates and update the pagelinks table accordingly so null edits are no longer necessary although it may take a while for big operations to complete this can help to ease strain on users html cache invalidation edit a wider class of operations can cause invalidation of the html cache for a large number of pages changing an image all the thumbnails have to be re rendered and their sizes recalculated deleting a page all the links to it from other pages need to change from blue to red creating or undeleting a page like above but from red to blue changing a template all the pages that transclude the template need updating except for template changes and uploading a not previously existing file these operations do not invalidate the links tables but they do invalidate the html cache of all pages linking to that page or using that image invalidating the cache of a page is a short operation it only requires updating a single database field and sending a multicast packet to clear the caches but if there are more than about 1000 to do it takes a long time by default jobs are added when more than 500 pages need to be invalidated one job per 500 operations typical values edit during a period of low loads the job queue might be zero at wikimedia the job queue is in practice almost never zero in off peak hours it might be a few hundred to a thousand during a busy day it might be a few hundred thousand values of several million are no cause for alarm but it can quickly fluctuate by 10 or more 1 furthermore several servers will have different estimates for this value so apparently more varying fluctuations can also be seen as of mediawiki 1 17 job queue length can be retrieved via the api at https en wikipedia org w api php action query meta siteinfo siprop statistics it is shown on the line labeled jobs 2 on wikipedia this value can come from one of several servers three as of 2009 and so may fluctuate significantly see also edit mw redis mw manual job queue references edit so what s in the job queue anyway brionv 2008 04 22 archived from the original on 2019 04 04 retrieved 2019 10 14 mw manual job queue special statistics mediawiki archived from the original on 2024 06 07 retrieved 2024 06 07 v t e wikipedia technical help get personal technical help at the teahouse help desk village pump technical talk pages or irc general technical help bypass cache keyboard shortcuts editing charinsert edit conflict edit toolbar reverting how to create a page irc tutorial mobile access multilingual support page history page information page name help printing software notices editnotice special characters entering user access levels visualeditor help special page related special page help allpages edit filter emailing users logging in reset passwords logs moving a page history merging non admin and admin only page moves notifications echo faq page curation page import pending changes random pages recent changes related changes searching linksearch tags user contributions watchlist what links here wikitext wikitext cheatsheet columns line break handling lists magic words for beginners conditional expressions switch parser function time function redirects sections and tocs tables introduction basics advanced table formatting collapsing conditional tables sortable tables using colours links and diffs links interlanguage interwiki permanent diffs colon trick link color pipe trick urls media files media help files creation and usage moving files to commons images introduction to images picture tutorial preparing images for upload uploading images options to hide an image extended image syntax svg help gallery tag graphics tutorials basic bitmap image editing how to improve image quality graphics lab resources sound file markup visual file markup other graphics family trees graphs and charts how to create barcharts to scale charts math formulas math symbols musical scores musical symbols timeline easytimeline syntax wikihiero syntax templates and lua modules templates advanced template coding template documentation template index template limits template sandbox and test cases citation templates lua help lua project resources to do substitution purge job queue transclusion labeled section costs and benefits guide to scribbling infinite parameters data structure namespaces main article category draft file file description page help portal project wikipedia talk archiving simple template user user page design mediawiki bug reports and feature requests timedmediahandler extension module special html and css cascading style sheets html in wikitext common js and common css classes in microformats markup validation span tags useful styles customisation and tools preferences gadgets skins citation tools cleaning up vandalism tools customizing watchlists hide pages irc scripts user scripts guide list techniques safe mode user style tools alternative browsing browser tools editing tools navigation shortcuts optimum tool set wikimedia cloud services beta features at mediawiki automated editing afc helper script antivandal autowikibrowser bots creating history hotcat huggle interceptor navigation popups redwarn twinkle ultraviolet wpcleaner inactive igloo stiki see also category wikipedia how to category wikipedia information pages further navigation at help pages administrators accessibility accounts bots referencing citation metadata templates user scripts retrieved from https en wikipedia org w index php title help job_queue oldid 1315315557 categories wikipedia information pages wikipedia link help this page was last edited on 6 october 2025 at 00 39 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents help job queue add languages add topic