KDE4 uses a lot of memory...

[mdh]

Seriously, look at this...

 1217 mdh           1  44    0 55052K 13104K select 1   4:26  0.00% kwalletd
 1184 mdh           3  97    0   124M 35732K ucond  0   0:00  1.46% plasma
 1014 root          1  45    0   506M   233M select 0 254:53  0.00% Xorg
 2124 mdh           3  44    0   104M 63188K ucond  1 104:50  0.00% ktorrent
 1205 mdh           1  44    0 56232K 15072K select 0  39:49  0.00% kmix
 1217 mdh           1  44    0 55052K 13104K select 1   4:26  0.00% kwalletd
 1170 mdh           1  44    0   107M 26644K select 1   2:48  0.00% kwin
 1211 mdh           1  44    0 52708K 13868K select 1   1:44  0.00% klipper
 1251 mdh           1  44    0 31976K 15836K select 1   0:40  0.00% kdeinit
 1239 mdh           1  44    0 42568K 23840K select 0   0:30  0.00% kdesvn
 1158 mdh           1  44    0 38964K 12196K select 1   0:08  0.00% klauncher
69993 mdh           1  44    0 33892K 13704K select 1   0:06  0.00% kdeinit
 1202 mdh           1  44    0 49916K 12240K select 1   0:05  0.00% kaccess
 1218 mdh           1  44    0 66656K 15608K select 0   0:04  0.00% korgac

It's not even kwin... look how much memory klipper is using, or kwalletd (which only stores two passwords for kdesvn).

The moral of the story here being not to bother with KDE4 if you have less than 2-3 gigs of RAM.

[adamk]

I regularly use KDE4 on a machine with a gig of RAM (running FreeBSD 7.1-PRERELEASE) without any problems.

Adam

[richardpl]

That is called shared memory. And have nothing to do with real memory. And it is also used in KDE3

[mdh]

Originally Posted by richardpl

That is called shared memory. And have nothing to do with real memory. And it is also used in KDE3

Are you sure that shared memory is listed in top for every application using it? That seems counterintuitive.

I just noticed that my box with 2 gigs of memory is swapping for the first time ever, since going to KDE4... it usually had at least half a gig to a gig of physical memory "free" under KDE3.

[richardpl]

In that case only reboot will fix it

If your kde4 session last very long, than strange memory leaks may happen.

Also, if some application is accessing lots of data on hard drive it may force kernel to move inactive memory to swap.

This also mean that you need to provide more useful information.

[graudeejs]

Originally Posted by mdh

Seriously, look at this...

 1217 mdh           1  44    0 55052K 13104K select 1   4:26  0.00% kwalletd
 1184 mdh           3  97    0   124M 35732K ucond  0   0:00  1.46% plasma
 1014 root          1  45    0   506M   233M select 0 254:53  0.00% Xorg
 2124 mdh           3  44    0   104M 63188K ucond  1 104:50  0.00% ktorrent
 1205 mdh           1  44    0 56232K 15072K select 0  39:49  0.00% kmix
 1217 mdh           1  44    0 55052K 13104K select 1   4:26  0.00% kwalletd
 1170 mdh           1  44    0   107M 26644K select 1   2:48  0.00% kwin
 1211 mdh           1  44    0 52708K 13868K select 1   1:44  0.00% klipper
 1251 mdh           1  44    0 31976K 15836K select 1   0:40  0.00% kdeinit
 1239 mdh           1  44    0 42568K 23840K select 0   0:30  0.00% kdesvn
 1158 mdh           1  44    0 38964K 12196K select 1   0:08  0.00% klauncher
69993 mdh           1  44    0 33892K 13704K select 1   0:06  0.00% kdeinit
 1202 mdh           1  44    0 49916K 12240K select 1   0:05  0.00% kaccess
 1218 mdh           1  44    0 66656K 15608K select 0   0:04  0.00% korgac

It's not even kwin... look how much memory klipper is using, or kwalletd (which only stores two passwords for kdesvn).

The moral of the story here being not to bother with KDE4 if you have less than 2-3 gigs of RAM.

does, this makes some problems?
Like apps can't start due to lack of memory?

[mdh]

Nah, there's still plenty of swap space. I just found it noteworthy and worth mentioning, as I never swapped before upgrading from KDE3 to KDE4.