Huge performance problems after updating from 2.4 to 2.5.8

Bron Gondwana brong at
Fri Jul 15 09:52:21 EDT 2016

On Fri, Jul 15, 2016, at 23:46, Andy Dorman via Info-cyrus wrote:
> So if the issue apparently lies with twoskip, can we keep our dbs using 
> skiplist and do the 2.4 -> 2.5 upgrade?  Is it possible -h could revert 
> back to skiplist?

You can convert a db back just by changing the setting in imapd.conf and restarting - it will convert itself.

mboxlist_db: skiplist

> If it could help we could test upgrading to 2.5.8 on our dev server 
> while leaving our database(s) as skiplist.

Twoskip should be fixed in 2.5.9.  I've worked out what went wrong, and am working on patches now :)


  Bron Gondwana
  brong at

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