Huge performance problems after updating from 2.4 to 2.5.8

Andy Dorman adorman at
Fri Jul 15 10:01:47 EDT 2016

On 07/15/2016 08:52 AM, Bron Gondwana via Info-cyrus wrote:
> 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.

Thanks Bron.  When we convert from 2.4 to 2.5.9 (as soon as the Debian 
package is available) I think we will do it in two steps...move to 2.5.9 
and then update the dbs in imapd.conf.  ;-)

The world-wide Cyrus community is very fortunate to have you and 
FastMail supporting Cyrus.

Andy Dorman
Ironic Design, Inc.

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