mysqld causes 2-3 wakeups per second on idle

[Luis Silva]

mysqld-akonadi consistently causes 2 to 3 wakeups per second on idle on my machine. This makes it the highest cause of wakeups coming from a user source for me. By comparison, virtuoso-t, used by nepomuk causes 0.5 wakeups per second.
Is there a way to tweak mysql to wake up less frequently?
---
Architecture: amd64
CheckboxSubmission: 46db008fca60ff4eb912f9c7f988bb35
CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e
DistroRelease: Ubuntu 10.10
InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427)
Package: mysql-server-core-5.1 5.1.49-1ubuntu8
PackageArchitecture: amd64
ProcEnviron:
 LANGUAGE=
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.35-21.31-generic 2.6.35.4
Tags: maverick
Uname: Linux 2.6.35-21-generic x86_64
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare users video

[Luis Silva (lacsilva)]

Wrong package.

[Luis Silva (lacsilva)]

apport information

[Luis Silva (lacsilva)]

Here is the log powertop generated.

[Clint Byrum (clint-fewbar)]

Moving to 5.5 as wishlist bugs won't be backported to prior releases.

[Morgan Tocker (morgo)]

I've filed a feature request with upstream. In 5.1/5.5 the InnoDB storage engine will have a background thread that wakes up every one second.

In future versions there will be more threads for background work (as this is required for multi-core scalability), so it is an interesting question how this will affect battery life.