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Am 18.09.2010 22:19, schrieb Alex Schuster: |
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> |
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> I used to restart kdm once per day in order to free memory. If I did not |
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> do this, KDE4 became nearly unsusabe. |
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> |
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Yeah, logout - logon seems to resolve my problem temporarily, as well. |
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> |
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> Now this looks different here. I have X with 946M, plasma-desktop with |
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> 505M, that's 15 times the memory you need. Then comes java with 371M (for |
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> TV-Browser - yes, 371MB just for showing the TV programme!), emerge wants |
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> 272M while emerging openoffice. Chromium also needs much memory, my 33 |
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> tabs want 762M: |
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Wow, especially X's usage makes me wonder whether this is a kernel bug. |
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> |
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> Which is another problem I think. One question is how KDE4 can need such a |
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> lot of memory, the other is how the system can become so unresponsive once |
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> its starts swapping. I used to have larger swap with less RAM, and did not |
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> have those performance problems. One year ago I usually had 2G tmpfs for |
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> /var/tmp/portage, nowadays (with 4G) I cannot emerge things while working |
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> with the system (like, watching videos with mplayer). It feels like as |
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> soon as RAM is not enough and swapping occurs, the system swaps stuff that |
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> it will need again immediately. |
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Hmm, maybe it is the usage pattern that matters. I guess X (or whatever |
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gets swapped out in your case) wants to access all the data, maybe for a |
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cyclic refresh or something, it blocks for some time. |
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That's the good thing about normal memory leaks: Whatever is leaked, it |
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is normally not accessed again, anyway. |
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> |
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> The system is an AMD Athlon 4850e (2 cores, 2500MHz) with 4GB of RAM. |
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> Everything is on LVM, most partitions are LUKS-encrypted. /var/tmp/portage |
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> is unencrypted, and at the moment swap is also not encrypted and on my 2nd |
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> drive. The encryption does not be much of an overhead, when the system |
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> stutters, top shows a large wa(it) value, and not much CPU usage. swappiness |
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> is set to 10. |
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> |
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My system is nearly completely on LUKS and LVM. That doesn't seem to be |
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the problym in my case, either. |
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> Any ideas? I might just get another 2G, and then the problems will be gone, |
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> but I think this would be only a workaround. 6G should be enough already |
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> even when using lots of applications, shouldn't it`? |
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> |
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> BTW, I emerged and tried KDE 3.5 a week ago. Cool, things were fast |
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> there. Probably because it needs less memory. But I don't want to go back. |
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> |
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The interesting thing is that I have a netbook with a minimal KDE-4 on |
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it. It doesn't need more than 150M of its 512M memory. Of course it |
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doesn't have Semantic Desktop and all that but it still works good and |
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is responsive as hell. |
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