I’ve been seeing an increased load since June without having any difference in users.
After enabling slow-queries in PHP and analyzing the nginx access logs it seemed that z-push was constantly querying Nextcloud. No idea why, but I’m suspecting it needed the addressbook and calander.
I’ve checked with the z-push admin to check the users and found that 1 users had 9 problems. These consisted of a couple of e-mails that couldn’t be send because of a verification error and calendar items that had a wrong start date. I’m guessing my Sabre DAV error is a result of this.
I looks like z-push does not fix these errors by itself. It will constantly loop until a manual resync of delation of the users state folder is done. I have no more errors since I deleted the state folder of the user.
Maybe an idea to implement a z-push resync or state deletion for all users every time MAIB is updated? Although I haven’t got any idea how many of you have seen the same problem.