On Mon, May 02, 2016 at 12:52:44PM -0000, Philip Muškovac wrote:
> Regarding switching to MariaDB, that is supported, but you need to
> replace mysql with mariadb in one go:
> 
> # apt-get install mariadb-client-core-10.0 mariadb-server-core-10.0

Note that migrating your data back to MySQL is generally not possible, so back
up your data first. MySQL/MariaDB packaging cannot currently do it anyway. I'm
not sure about akonadi.

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https://bugs.launchpad.net/bugs/1576930

Title:
  Excessive consumption RAM of mysqld daemon in Kubuntu 16.04

Status in akonadi package in Ubuntu:
  Confirmed

Bug description:
  In the last days using Kubuntu 16.04 I've noticed that after a while
  of use, RAM consumption of mysqld daemon rises above 800 MB, even
  surpassing Firefox, as you can see in the attached images.

  Initially, when system is just booted, RAM consumption of mysqld daemon it 
remains approximately 135-140 MB, but I have seen how after a while, in a 
matter of a few minutes, without touching anything, consumption rises 
progressively to around 830 MB.
  In the second image you can see that mysqld daemon is related to Akonadi, 
which at the same time has a lot of threads running. It is possible that the 
problem is in managing Akonadi processes, but it is clear that consumption of 
mysqld daemon is not normal, and that there must be a problem, either MySQL or 
Akonadi, causing this situation.

  I tried replacing MySQL with MariaDB, but will not let me uninstall
  MySQL components without also uninstall a lot of applications as
  dependencies (like Akonadi, Amarok, Kontact, KAdressBook ...). What I
  can do, even as an interim solution?

  
  Here are the attached screenshots:
  https://www.sendspace.com/file/712oyk
  https://www.sendspace.com/file/qcqeem

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