Bug 309920

When running kmail2 it creates 40-70 mb/s write activity to the diks. There's no running action or any user interaction. iotop lists a akonadi job as the one creating the write activity.
Nepomuk is already disabled.
There are around 400.00 mails in the maildir format. The size of the mail folder is around 2 GB. There was no problem with the former kmail. The problem first occured when installing an new Kubunt 12.04.01 LTS.
It is strange, that there is only a huge write activity and not a read activity.

If you need some more information, I will try to provide them. Upgrading to unstable package is not really possible as it is a productiy environment. Without fixing this bug I really consider switchting to another mail program as it makes work really difficult.

Reproducible: Always

Steps to Reproduce:
1. Start Kmail2
2. Watch disk activity.
Actual Results:  
The disk activity is around 40-70 mb/s.

Expected Results:  
The disk activity is low.

Output of "apt-cache show kmail"

Package: kmail
Priority: optional
Section: mail
Installed-Size: 3644
Maintainer: Kubuntu Developers <kubuntu-devel@lists.ubuntu.com>
Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Source: kdepim
Version: 4:4.8.5-0ubuntu0.1
Replaces: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Provides: imap-client, mail-reader
Depends: kde-runtime, kdepim-runtime, kdepimlibs-kio-plugins, libakonadi-contact4 (>= 4:4.8.1), libakonadi-kde4 (>= 4:4.8.1), libakonadi-kmime4 (>= 4:4.8.1), libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libgpgme++2 (>= 4:4.8.1), libkabc4 (>= 4:4.8.1), libkcalcore4 (>= 4:4.5.86), libkcalutils4 (>= 4:4.5.86), libkcmutils4 (>= 4:4.8.1), libkdecore5 (>= 4:4.8.1), libkdepim4 (= 4:4.8.5-0ubuntu0.1), libkdeui5 (>= 4:4.8.1), libkio5 (>= 4:4.8.1), libkleo4 (= 4:4.8.5-0ubuntu0.1), libkmime4 (>= 4:4.8.1), libknotifyconfig4 (>= 4:4.8.1), libkontactinterface4 (>= 4:4.8.1), libkparts4 (>= 4:4.8.1), libkpgp4 (= 4:4.8.5-0ubuntu0.1), libkpimidentities4 (>= 4:4.8.1), libkpimtextedit4 (>= 4:4.8.1), libkpimutils4 (>= 4:4.8.1), libksieveui4 (= 4:4.8.5-0ubuntu0.1), libmailcommon4 (= 4:4.8.5-0ubuntu0.1), libmailtransport4 (>= 4:4.8.1), libmessagecomposer4 (= 4:4.8.5-0ubuntu0.1), libmessagecore4 (= 4:4.8.5-0ubuntu0.1), libmessagelist4 (= 4:4.8.5-0ubuntu0.1), libmessageviewer4 (= 4:4.8.5-0ubuntu0.1), libnepomuk4 (>= 4:4.8.1), libqt4-dbus (>= 4:4.5.3), libqt4-network (>= 4:4.5.3), libqt4-xml (>= 4:4.5.3), libqtcore4 (>= 4:4.7.0~beta1), libqtgui4 (>= 4:4.8.0), libsolid4 (>= 4:4.8.1), libsoprano4 (>= 2.1.67), libstdc++6 (>= 4.6), libstreamanalyzer0 (>= 0.7.7), libstreams0 (>= 0.7.7), libtemplateparser4 (= 4:4.8.5-0ubuntu0.1), perl
Recommends: gnupg2, gnupg-agent, pinentry-qt4
Suggests: kaddressbook, kleopatra, spamassassin | bogofilter | spambayes | bsfilter | crm114, clamav, procmail
Breaks: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Filename: pool/main/k/kdepim/kmail_4.8.5-0ubuntu0.1_amd64.deb
Size: 968212
MD5sum: eae2f1ab324d2e00a05064d9902f63b3
SHA1: 61e248a66d2853a683183e45c964ec9d365a2d8e
SHA256: 56d2a2aea86d63c61d251815945329c5f4ea9ad7b411e7354fe2fb54f2502cd0
Description-en: full featured graphical email client
 KMail is a fully-featured email client that fits nicely into the KDE
 desktop. It has features such as support for IMAP, POP3, multiple accounts,
 mail filtering and sorting, PGP/GnuPG privacy, and inline attachments.
 .
 This package also contains Nepomuk EMail Feeder Akonadi Agent.
 .
 This package is part of the KDE PIM module.
Homepage: http://kontact.kde.org/kmail/
Description-md5: de6424691ace5b563c821de50a5124f4
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: kubuntu-desktop, kubuntu-full, kubuntu-active-desktop, kubuntu-active-full, edubuntu-desktop-kde

Package: kmail
Priority: optional
Section: mail
Installed-Size: 3643
Maintainer: Kubuntu Developers <kubuntu-devel@lists.ubuntu.com>
Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Source: kdepim
Version: 4:4.8.4a-0ubuntu0.3
Replaces: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Provides: imap-client, mail-reader
Depends: kde-runtime, kdepim-runtime, kdepimlibs-kio-plugins, libakonadi-contact4 (>= 4:4.8.1), libakonadi-kde4 (>= 4:4.8.1), libakonadi-kmime4 (>= 4:4.8.1), libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libgpgme++2 (>= 4:4.8.1), libkabc4 (>= 4:4.8.1), libkcalcore4 (>= 4:4.5.86), libkcalutils4 (>= 4:4.5.86), libkcmutils4 (>= 4:4.8.1), libkdecore5 (>= 4:4.8.1), libkdepim4 (= 4:4.8.4a-0ubuntu0.3), libkdeui5 (>= 4:4.8.1), libkio5 (>= 4:4.8.1), libkleo4 (= 4:4.8.4a-0ubuntu0.3), libkmime4 (>= 4:4.8.1), libknotifyconfig4 (>= 4:4.8.1), libkontactinterface4 (>= 4:4.8.1), libkparts4 (>= 4:4.8.1), libkpgp4 (= 4:4.8.4a-0ubuntu0.3), libkpimidentities4 (>= 4:4.8.1), libkpimtextedit4 (>= 4:4.8.1), libkpimutils4 (>= 4:4.8.1), libksieveui4 (= 4:4.8.4a-0ubuntu0.3), libmailcommon4 (= 4:4.8.4a-0ubuntu0.3), libmailtransport4 (>= 4:4.8.1), libmessagecomposer4 (= 4:4.8.4a-0ubuntu0.3), libmessagecore4 (= 4:4.8.4a-0ubuntu0.3), libmessagelist4 (= 4:4.8.4a-0ubuntu0.3), libmessageviewer4 (= 4:4.8.4a-0ubuntu0.3), libnepomuk4 (>= 4:4.8.1), libqt4-dbus (>= 4:4.5.3), libqt4-network (>= 4:4.5.3), libqt4-xml (>= 4:4.5.3), libqtcore4 (>= 4:4.7.0~beta1), libqtgui4 (>= 4:4.8.0), libsolid4 (>= 4:4.8.1), libsoprano4 (>= 2.1.67), libstdc++6 (>= 4.6), libstreamanalyzer0 (>= 0.7.7)
, libstreams0 (>= 0.7.7), libtemplateparser4 (= 4:4.8.4a-0ubuntu0.3), perl
Recommends: gnupg2, gnupg-agent, pinentry-qt4
Suggests: kaddressbook, kleopatra, spamassassin | bogofilter | spambayes | bsfilter | crm114, clamav, procmail
Breaks: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Filename: pool/main/k/kdepim/kmail_4.8.4a-0ubuntu0.3_amd64.deb
Size: 968394
MD5sum: f35a1144141a283cc42a4cf5ab8e3270
SHA1: 459188a89caadf31c50dd0e12e0b7387613e6e91
SHA256: 8a6ceb71fa8639def2e40378c5d71e41dd5f0b1dab2a2d83d687ef83d6b57621
Description-en: full featured graphical email client
 KMail is a fully-featured email client that fits nicely into the KDE
 desktop. It has features such as support for IMAP, POP3, multiple accounts,
 mail filtering and sorting, PGP/GnuPG privacy, and inline attachments.
 .
 This package also contains Nepomuk EMail Feeder Akonadi Agent.
 .
 This package is part of the KDE PIM module.
Homepage: http://kontact.kde.org/kmail/
Description-md5: de6424691ace5b563c821de50a5124f4
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: kubuntu-desktop, kubuntu-full, kubuntu-active-desktop, kubuntu-active-full, edubuntu-desktop-kde

Package: kmail
Priority: optional
Section: mail
Installed-Size: 3638
Maintainer: Kubuntu Developers <kubuntu-devel@lists.ubuntu.com>
Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Architecture: amd64
Source: kdepim
Version: 4:4.8.2-0ubuntu2
Replaces: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Provides: imap-client, mail-reader
Depends: kde-runtime, kdepim-runtime, kdepimlibs-kio-plugins, libakonadi-contact4 (>= 4:4.8.1), libakonadi-kde4 (>= 4:4.8.1), libakonadi-kmime4 (>= 4:4.8.1), libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libgpgme++2 (>= 4:4.8.1), libkabc4 (>= 4:4.8.1), libkcalcore4 (>= 4:4.5.86), libkcalutils4 (>= 4:4.5.86), libkcmutils4 (>= 4:4.8.1), libkdecore5 (>= 4:4.8.1), libkdepim4 (= 4:4.8.2-0ubuntu2), libkdeui5 (>= 4:4.8.1), libkio5 (>= 4:4.8.1), libkleo4 (= 4:4.8.2-0ubuntu2), libkmime4 (>= 4:4.8.1), libknotifyconfig4 (>= 4:4.8.1), libkontactinterface4 (>= 4:4.8.1), libkparts4 (>= 4:4.8.1), libkpgp4 (= 4:4.8.2-0ubuntu2), libkpimidentities4 (>= 4:4.8.1), libkpimtextedit4 (>= 4:4.8.1), libkpimutils4 (>= 4:4.8.1), libksieveui4 (= 4:4.8.2-0ubuntu2), libmailcommon4 (= 4:4.8.2-0ubuntu2), libmailtransport4 (>= 4:4.8.1), libmessagecomposer4 (= 4:4.8.2-0ubuntu2), libmessagecore4 (= 4:4.8.2-0ubuntu2), libmessagelist4 (= 4:4.8.2-0ubuntu2), libmessageviewer4 (= 4:4.8.2-0ubuntu2), libnepomuk4 (>= 4:4.8.1), libqt4-dbus (>= 4:4.5.3), libqt4-network (>= 4:4.5.3), libqt4-xml (>= 4:4.5.3), libqtcore4 (>= 4:4.7.0~beta1), libqtgui4 (>= 4:4.8.0), libsolid4 (>= 4:4.8.1), libsoprano4 (>= 2.1.67), libstdc++6 (>= 4.6), libstreamanalyzer0 (>= 0.7.7), libstreams0 (>= 0.7.7), libtemplateparser4 (= 4:4.8.2-0ubuntu2), perl
Recommends: gnupg2, gnupg-agent, pinentry-qt4
Suggests: kaddressbook, kleopatra, spamassassin | bogofilter | spambayes | bsfilter | crm114, clamav, procmail
Breaks: akonadi-kde (<< 4:4.1.3), kmailcvt (<< 4:3.90.0), kontact (<< 4:4.2.85)
Filename: pool/main/k/kdepim/kmail_4.8.2-0ubuntu2_amd64.deb
Size: 967298
MD5sum: 5bd459f22abd86d9eb9ff0cc9a67a349
SHA1: dbb81d4dec8b6934dfde7d2970ac378ac2e2cf4b
SHA256: 702365d33bb6347275f6cb1fd6f53df8ee1f950b6245c66d258388853dba8ae2
Description-en: full featured graphical email client
 KMail is a fully-featured email client that fits nicely into the KDE
 desktop. It has features such as support for IMAP, POP3, multiple accounts,
 mail filtering and sorting, PGP/GnuPG privacy, and inline attachments.
 .
 This package also contains Nepomuk EMail Feeder Akonadi Agent.
 .
 This package is part of the KDE PIM module.
Homepage: http://kontact.kde.org/kmail/
Description-md5: de6424691ace5b563c821de50a5124f4
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu
Supported: 5y
Task: kubuntu-desktop, kubuntu-full, kubuntu-active-desktop, kubuntu-active-full, edubuntu-desktop-kde