Version: (using KDE 4.4.1) Compiler: gcc443 OS: Linux Installed from: Gentoo Packages For the whole time kmail uses a substantial amount of cpu (up to 30% on a Pentium(R) Dual-Core CPU T4300 @ 2.10GHz). I used iotop to determine which process is responsible for the huge amount of disk i/o and it says that the kmail process is reading 10-30MB/s for the whole ~15 minutes it needs to complete the checkmail (3 dimap, 4 pop3). The kmail interface is terribly sluggish for the whole time, the rest of the system however behaves as usual as long as I don't need substantial access to the disk. The check used to take at most one minute but when kmail refused to start without akonadi and I configured it properly, I found myself in this trouble. All checks following the first one are flawless. The size of my folders is ~15GB total.
Downgrading to mysql 5.0 solved the problem.
That is no solution. This bug should be open.
Seems it's properly solved at least for some distros? http://blog.tampakrap.gr/akonadi-now-works-with-mysql-5-1/