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Grant wrote: |
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> If I'm reading that right, I'm only *using* using 340MB. Why doesn't |
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> the system get rid of some of the inactive stuff in memory so I don't |
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> have to use more and more swap and slow down my system? |
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|
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that's what swap does. It moves inactive stuff onto disk so : |
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|
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* apps have more ram - thus faster |
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* the OS can cache more data - thus faster |
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|
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I'll post some of my systems, so you can see their swap usage. The |
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machines with the most IO utilize the most swap. The one that serves |
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purely dynamic pages uses very little swap - and it's apache server has |
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fewer dynamic modules compiled in so that will help on memory foot print |
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usage. However, swap usage isn't a bad thing. In fact, it most cases |
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it's a really, really good thing. |
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|
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[Terminal Server] gentoo running 2.6.x kernel. I'm doing an emerge, and |
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I have 10 physically different people logged on the system doing work. |
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Running on dual 1.6 Ghz opertons. High load average is mostly disk IO |
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due to emerge. |
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|
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11:56:03 up 18 days, 12:04, 25 users, load average: 7.65, 7.23, 5.63 |
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total used free shared buffers cached |
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Mem: 2009 1591 417 0 57 341 |
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-/+ buffers/cache: 1192 816 |
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Swap: 4094 1218 2876 |
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|
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However, since I'm using the ck-sources, and most of the apps are |
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interactive, no one even notices I'm doing anything funny. |
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|
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[Web Server] suse running 2.4.x kernel, a peak of about 15 hits per |
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second, and peak traffic of 670kbps. does not act slow. Running on 1.2 |
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Ghz P3. Also email virus scanner, SMTP and POP - I don't have peak usage |
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on those services. |
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|
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11:52am up 274 days, 18:38, 1 user, load average: 0.00, 0.02, 0.02 |
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total used free shared buffers cached |
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Mem: 1005 929 75 0 183 319 |
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-/+ buffers/cache: 426 578 |
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Swap: 1027 698 328 |
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|
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[secure commerce server] redhat running 2.4.x kernel, a peak of about 12 |
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hits per minute, and about 130 kbps. Also not slow, all pages dynamic. |
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Running on 1.2 Ghz P3. Database on another system. |
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|
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12:17pm up 67 days, 3:08, 2 users, load average: 0.01, 0.06, 0.06 |
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total used free shared buffers cached |
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Mem: 439 414 24 0 159 117 |
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-/+ buffers/cache: 137 301 |
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Swap: 509 37 472 |
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|
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|
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-- |
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