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   1 # Database maintenance tasks
   2
   3 Every command should be ran with a prefix, in case of OTP releases it is `./bin/pleroma_ctl database` and in case of source installs it's `mix pleroma.database`.
   4
   5 !!! danger
   6     These mix tasks can take a long time to complete. Many of them were written to address specific database issues that happened because of bugs in migrations or other specific scenarios. Do not run these tasks "just in case" if everything is fine your instance.
   7
   8 ## Replace embedded objects with their references
   9
  10 Replaces embedded objects with references to them in the `objects` table. Only needs to be ran once if the instance was created before Pleroma 1.0.5. The reason why this is not a migration is because it could significantly increase the database size after being ran, however after this `VACUUM FULL` will be able to reclaim about 20% (really depends on what is in the database, your mileage may vary) of the db size before the migration.
  11
  12 ```sh
  13 $PREFIX remove_embedded_objects [<options>]
  14 ```
  15
  16 ### Options
  17 - `--vacuum` - run `VACUUM FULL` after the embedded objects are replaced with their references
  18
  19 ## Prune old remote posts from the database
  20
  21 This will prune remote posts older than 90 days (configurable with [`config :pleroma, :instance, remote_post_retention_days`](../../configuration/cheatsheet.md#instance)) from the database, they will be refetched from source when accessed.
  22
  23 !!! note
  24     The disk space will only be reclaimed after `VACUUM FULL`
  25
  26 ```sh
  27 $PREFIX pleroma.database prune_objects [<options>]
  28 ```
  29
  30 ### Options
  31 - `--vacuum` - run `VACUUM FULL` after the objects are pruned
  32
  33 ## Create a conversation for all existing DMs
  34
  35 Can be safely re-run
  36
  37 ```sh
  38 $PREFIX bump_all_conversations
  39 ```
  40
  41 ## Remove duplicated items from following and update followers count for all users
  42
  43 ```sh
  44 $PREFIX update_users_following_followers_counts
  45 ```
  46
  47 ## Fix the pre-existing "likes" collections for all objects
  48
  49 ```sh
  50 $PREFIX fix_likes_collections
  51 ```