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Paul Hartman writes: |
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> On Wed, May 25, 2011 at 9:20 AM, Alex Schuster <wonko@×××××××××.org> wrote: |
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> I can't remember the last time my swap was used at all. I have 12G of |
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> RAM, but in my prior system with 8G it was the same. Only in a rare |
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> case when some program had run-away memory usage/memory leak did I |
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> ever get to swap usage... I'm using vanilla kernel 2.6.39 with no |
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> patches, no BFS. And I use proprietary nvidia-drivers. I normally |
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> don't have so many programs running at once, but it happens sometimes. |
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Maybe I should have bought 4G instead of 2G, so I'd have 10G, not 8G. |
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I'm not sure if this is recommended these days, to have one memory bank |
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with 4G and 3 others with 2G each. |
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> Since 2.6.38 and enabling automatic process grouping, I don't use nice |
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> or ionice at all anymore. I do parallel emerge with -j along with make |
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> -j12 and never notice any slowdown or lag in UI at all. |
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This is okay now, since I started using the pf-sources. But I have no |
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explanation, I have been using the BFS scheduler already before with |
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ck-sources. |
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> With KDE4 logged in, and no GUI apps running (other than knutmon and |
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> wicd), my RAM usage is slightly less than 900M (not counting |
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> filesystem caches). |
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I don't want to log out now, but I have logs of experiments I did half a |
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year ago. After a reboot, at the KDM login screen, the +/- buffers/cache |
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line of free -m output showed 244M used. After logging into KDE4, it's |
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2954M, but I have maby apps (Konsoles, Kontact, Amarok, TV-Browser, |
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Dolphin, Chromium) being started automatically. |
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>> BTW, does anyone else's kwin use 750M? That's pretty high, I think it used |
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>> to be more like 300M. |
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> |
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> My kwin (4.6.3-r1) has currently 507M VIRT, 54M RES, 37M SHR according to top. |
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It's growing: 1405m VIRT, 851m RES, 6m SHR. Strange, I did not actually |
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use the desktop after I wrote the mail you replied to, currently I'm |
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logged in from remote. |
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And it grows while I compose this mail, about 1M every 2 minutes. This |
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is not normal, though. |
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I use a little script to create a log file with some memory information, |
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and when I grep these 50 files for the kwin process, I see memory usage |
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between 410M and 520M mostly. Three were higher, up to 1.4G, but these |
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were plasma bugs (suddenly haveing eight activities instead of one; and |
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a problem of the file watcher plasmoid with very large log files). |
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I also found one log with kwin using only 154M, but that was when I had |
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KDE 3.5 running :) |
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> My worst memory offenders, by resident memory: |
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> clamd 124M |
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> denyhosts 114M |
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> X 75M |
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> plasma-desktop 56M |
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kwin 851 |
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kontact 385 |
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java 373 (TV-Browser, this is also growing) |
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X 124 |
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okular 115 |
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chrome 110 |
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chrome 106 |
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mysqld 93 |
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... |
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BTW, with each Chromium tab being a single process, I wonder which tab |
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uses 100M of RAM. |
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> My PC doesn't swap, but in my Nokia N900, it runs Linux and X, heavy |
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> use of gtk and Qt4 libs, it has 256M of RAM and 768M of swap on eMMC |
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> (transfer rate about 20MB/sec). It swaps like crazy. :) Usually there |
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> is more swap in use than RAM, actually. |
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> |
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> When I move the swap to a slow SD card instead (2MB/sec transfer |
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> rate), even in that slow device, swapoff on the eMMC swap partition |
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> with ~500M in-use takes about 2 or 3 minutes at most with the data |
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> being swapped slowly into the SD card. |
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> |
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> So I think in your case it should be much faster than that! |
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Or not, with the large access times of hard drive. I don't know how |
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large the chunks of memory stored in swap are, I thought some megabytes |
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at least. Does anyone have an idea? I'd ask Volker, but I'm worried |
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about his gall bladder. |
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From another mail: |
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> Or better yet, figure out why his system is swapping at all which is |
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> what he was going for I think. With 8 GB I think he should be able to |
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> disable swap entirely anyway. :) |
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That's what I think, too. As I wrote, I always used to have many |
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applications open, and in the past this was no problem. If anyone is |
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interested, there are some screenshots of my desktop here: |
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http://www.wonkology.org/comp/desktop/ |
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The 2010-11-28 shows the six desktops I have now, shortly after login. |
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It's made half a year ago, but my desktop still looks quite similar. |
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right now I have some extra stuff running, but not very much. |
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And looking at the 3x3 desktops in one image (desktop3x3.png) from 2004, |
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I see I was using 856M of RAM and 748M of swap then. With a Windows VM, |
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a Mozilla window, some 15 or more Galeon tabs, and some more stuff. |
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Without big performance problems. It might have taken a little while |
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before the Windows VM became fully responsive, but I did not have the |
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constant swapping I experience now. |
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Wonko |
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