I have KMail 1.9.1. My mail is POP.
I have SpamAssassin filtering my incoming mail.
While all my mail folders have grown significantly (the spam folder has over 3900 messages), KMail has become gradually very slow. It's slow not only for downloads, but for simple actions like deleting a message or moving it (sometimes moving a message to another folder can take one minute). There are moments when, apparently, some process ends and KMail is able to behave normally, like before.
The rest of KDE has a decent performance, as usual.
When I switch to KMail, my recently installed Ksensors shows a sudden increase in the CPU status, with "user" raising from about 3% to 80% and "system" from 0.8% to 20%.
Here is the output of hdparm /dev/hda
multcount = 0 (off)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 16383/255/63, sectors = 117210240, start = 0
I will appreciate some hints about this performance problem.
I followed the advice on the KMail manual about how to optimize my filters, but that did not make any difference.
I suspect that SpamAssassin could be the main culprit but, why does KMail bog down long after the messages were downloaded from the server?