When composing a message and saving it as a draft without having written any text yet, akonadiserver will become very busy, resulting in a sluggish overall system. Note that this also affects saving as a template, where having an empty text area could be considered a common use case. Symptoms include the log filling up with > org.kde.pim.akonadiserver: ItemRetrievalJob for request 646 finished (with the counter incrementing by one each time) even when KMail is idle/unfocussed. There are two cases for the logging frequency: - several messages a second if the mail is selected, going along with very high CPU usage (kmail, mysqld and akonadiserver in particular) - a message every 5 seconds if a different (non-broken) mail is selected The issue persists even after restarting KMail and Akonadi. Steps to reproduce: - start KMail with a clean KMail/Akonadi config - no need to create any account besides "Local Folders" - create new mail, leave all fields empty, save as draft - select mail, notice high CPU usage and excessive logging - edit mail by adding text in the message editor, save as draft again - notice CPU becoming idle again, no more logging Affected versions: - can be reproduced with KF5 and KDE PIM from git master as of today (5.14.40) and Qt 5.14.1 - KMail 5.9.2 is affected too - KMail 5.5.2 is _not_ affected Possibly related: Bug 398407