[Dovecot] load increase after upgrade to 2.0.8

[Ralf Hildebrandt]

* David Ford <david at blue-labs.org>:

> what's your task switch HZ compiled at? CONFIG_HZ_1000?  you would
> probably be better at 300 or 250.  have you tried tickless?

# fgrep HZ /boot/config-2.6.32-25-generic-pae
CONFIG_NO_HZ=y
CONFIG_HZ_250=y
CONFIG_HZ=250

> is your kernel compiled for precisely your cpu type and smp/hyper
> options set correctly?

It's an Ubuntu kernel (config-2.6.32-25-generic-pae)

> what about CONFIG_PREEMPT?  definitely don't use realtime, server is
> appropriate.

# fgrep PREEMPT /boot/config-2.6.32-25-generic-pae
# CONFIG_TREE_PREEMPT_RCU is not set
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set

It's the same kernel 1.2.x is running on, without problems.

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebrandt at charite.de | http://www.charite.de