How can I find unused attachments?

Question

We can have a page on our Confluence environment which has over 30 images and PDF attachments. 10 of those for example might no be shown on the page any more because they have replaced with a file using a different name.

How can we locate all unused attachments? Is there a select SQL we can execute which can help us find this out?

Our site storage is forever increasing. Having a list of all the redundant files will allow us to clear some space.

Lucas Modzelewski _Lumo_ · Answer

There is an ongoing ticket for Confluence: https://jira.atlassian.com/browse/CONFCLOUD-16577

I recently had to remove some attachments, and I've made an app for that. You can check out the app here: https://marketplace.atlassian.com/apps/1236523?tab=overview&hosting=cloud

Robert Hellmann · Answer

I just created a SQL statement for Oracle. It returns the file size and whether the attachment title is found in bodycontent clob field (the real content).

select 
  c.contentid,
  c.title,
  c.lastmoddate,
  c.pageid,
  round(cp.longval / 1024 / 1024, 1) as "size MB",
  (case
     when DBMS_LOB.INSTR(b.body, c.title) > 0 then
       'true'
     ELSE
       'false'
     end) "found in page"
from content c
  join spaces s
    on s.spaceid = c.spaceid
  JOIN Contentproperties cp
    on cp.contentid = c.contentid
  join bodycontent b
    on b.contentid = c.pageid
where lower(s.spacekey) = 'amerisc'
  and lower(c.contenttype) = 'attachment'
  and cp.propertyname = 'FILESIZE'
order by c.pageid, c.title

AlutusTech · Answer

We have created this plugin which scans the Confluence database to identify unused attachments:
https://marketplace.atlassian.com/apps/1216349/confluentis-unused-attachments?hosting=server&tab=overview