This is aninformation page. It is not anencyclopedic article, nor one ofWikipedia's policies or guidelines; rather, its purpose is to explain certain aspects of Wikipedia's norms, customs, technicalities, or practices. It may reflect differing levels ofconsensus andvetting. |
A Wikipedialog is an automatically generated list of actions of a certain type, showing when they were performed, by what user, and with respect to what page or other user. Logged actions include page deletions and restorations, page moves (renames), user blocks and unblocks, page protections and unprotections, user account creations, abuse filter reports, and others.
Logs can list actions doneby a user (or IP editor), actions doneto a user (or IP editor), and actions doneto a wiki page.
To view Wikipedia's logs, go toSpecial:Log. From there you can decide which actions you wish to see logged, and filter by certain other parameters, such as date and time, user and affected page. When a log type is selected and you click "Show", the top of the page describes the log. You can also go directly to a selected log with a search term or link likeSpecial:Log/block, which displays the block log. Other parameters that can be used in a similar way includedelete,move,protect,rights,upload andpatrol.
A link to the log of actions relating to a particular page can be found on the "View logs for this page" link on the "View history" tab at top of the page. A link to the log of actions by a particular user can be found on the left-hand side when the user's talk page or user page is opened. Remember, however, that these are actionsperformed by that user; for actions affecting a given user (such as blocks), the username (preceded by "User:") must be entered in the "Title" field of the log page, not the "User" field. (This configuration can be accessed directly from the "View history" tab of the user's userpage.)

Wikipedia logs are generally permanently retained. As in, logs are continuously growing without any pruning of old entries.
There is no function where regular users can delete entire logs or individual entries. What you can do, however, for individual logs likeNotifications is mark them as read, and you can safely ignore them after that.
Admins can delete log entries - for details please seeWikipedia:Revision deletion.WP:BLPCOMPLAINT could also be relevant if there is an article with you as the subject.
Log files which are not automatically generated can be found inCategory:Wikipedia logs. Old log files of actions which have now switched to automatic logging can be found inCategory:Wikipedia obsolete log pages. Some of these old files are listed by type atWP:Block log,WP:Bureaucrat log,WP:Deletion log,WP:Protection log andWP:Upload log. (These actions moved to automatic logging in December 2004.)
Several other pages in the "Special:" namespace (such asSpecial:RecentChanges) serve similar functions to those of logs. For these, seeHelp:Special pages.
Still more information is provided byWikipedia:Database reports. For example,Wikipedia:Database reports/Users by log action contains a list of users ordered by number of logged actions performed.