| [notify-threads](help/database/db_notify-threads) | |
| [oembed](help/database/db_oembed) | cache for OEmbed queries |
| [parsed_url](help/database/db_parsed_url) | cache for "parse_url" queries |
-| [participation](help/database/db_participation) | Storage for participation messages from Diaspora |
| [pconfig](help/database/db_pconfig) | personal (per user) configuration storage |
| [photo](help/database/db_photo) | photo storage |
| [poll](help/database/db_poll) | data for polls |