Eirik Rye
2021-May-20 12:12 UTC
Dovecot v2.3.13 reporting (very) incorrect vsize for some maildir folders
> On 20 May 2021, at 13:44, Timo Sirainen <timo at sirainen.com> wrote: > > You can also look at the folder-level vsizes to see which one is causing the differences (or are they all doubled?)In this user's case, it is only the Trash-folder that has the wrong vsize calculation: # doveadm mailbox status -u <username> 'messages vsize' '*' Drafts messages=0 vsize=0 Sent messages=0 vsize=0 Trash messages=14870 vsize=14584428026 Spam messages=3 vsize=227701 INBOX messages=1866 vsize=1640766021 The other mailboxes (INBOX and Spam) are both within what I consider reasonable in terms of differences in virtual/physical sizes: # du -bs /mail/<username>/Maildir/cur 1603071610 /mail/<username>/Maildir/cur # du -bs /mail/<username>/Maildir/.Spam 241489 /mail/<username>/Maildir/.Spam But the Trash mailbox is physically HALF the size of what Dovecot reports: # du -bs /mail/<username>/Maildir/.Trash 7200481589 /mail/<username>/Maildir/.Trash The message count reported by dovecot (14870) is correct, however: # ls /mail/<username>/Maildir/.Trash/cur | wc -l 14870 With the other users I have noticed the same issue, it's a different mailbox and not Trash. One user has a mailbox reported by Dovecot as being ~13.7GB while it is actually physically only around 0.3GB. For this user I haven't tried stripping W= sizes or deleting dovecot control files, though. - Eirik
Timo Sirainen
2021-May-20 12:59 UTC
Dovecot v2.3.13 reporting (very) incorrect vsize for some maildir folders
On 20. May 2021, at 14.12, Eirik Rye <rye at trojka.no> wrote:> > >> On 20 May 2021, at 13:44, Timo Sirainen <timo at sirainen.com> wrote: >> >> You can also look at the folder-level vsizes to see which one is causing the differences (or are they all doubled?) > > In this user's case, it is only the Trash-folder that has the wrong vsize calculation: > > # doveadm mailbox status -u <username> 'messages vsize' '*' > Drafts messages=0 vsize=0 > Sent messages=0 vsize=0 > Trash messages=14870 vsize=14584428026 > Spam messages=3 vsize=227701 > INBOX messages=1866 vsize=1640766021 > > The other mailboxes (INBOX and Spam) are both within what I consider reasonable in terms of differences in virtual/physical sizes: > > # du -bs /mail/<username>/Maildir/cur > 1603071610 /mail/<username>/Maildir/cur > # du -bs /mail/<username>/Maildir/.Spam > 241489 /mail/<username>/Maildir/.Spam > > But the Trash mailbox is physically HALF the size of what Dovecot reports: > > # du -bs /mail/<username>/Maildir/.Trash > 7200481589 /mail/<username>/Maildir/.Trash > > The message count reported by dovecot (14870) is correct, however: > > # ls /mail/<username>/Maildir/.Trash/cur | wc -l > 14870 > > With the other users I have noticed the same issue, it's a different mailbox and not Trash.Well, next step could be to compare individual mail sizes. It would require writing some kind of a script to do the comparison though. But for example you could look at both physical & virtual sizes in dovecot first to see if there's a big difference: doveadm fetch -u user 'guid storageid size.physical size.virtual' mailbox Trash I think either guid or storageid or both have the Maildir base filename. You could also compare those to the ls -l output.