On Tue Mar 13 2018 07:42:31 GMT-0400 (Eastern Standard Time), Aki Tuomi <aki.tu...@dovecot.fi> wrote: >> Is this index file kept on a per *folder* basis? Or per user/account?
> Yes Yes... per folder? Or per user? >> If it is per folder, then it is much less of a problem, and could be >> worked around simply by moving messages around (say, archiving). > It can help. But if you are not accessing all the mails e.g. migrating > them, you can usually just rm the cache file and it'll probably won't > grow fast back. So, how would doing this impact performance? If it doesn't much, then maybe a simple script to test the size and delete when it gets larger than (whatever you like)? Thanks Aki!