Re: time tells all about kernel VM's

Mike Fedyk (mfedyk@matchmail.com)
Wed, 24 Oct 2001 12:57:17 -0700


On Wed, Oct 24, 2001 at 07:55:27AM -0400, safemode wrote:
> ok. Reran e2defrag and got the same effect.
> This is the vmstat output by the second. It starts out with my normal load
> (but no mp3s playing). Then i start e2defrag with the same arguments as
> before and allow it to run all the way through. It ends but i dont close it
> until near the very end (which is seen by the swap dropoff. Then i let my
> normal load again be displayed a bit. One thing i did notice, however, was
> that the vm handled that quite a lot better than how it handled it after
> being up for 5 days even though it created the 600MB of buffer.
>

Hmm. I have seen similar behavior with:

file -type f -exec cat '{}' \; > /dev/null

I get a very big buffer cache, and very small page cache.

Kernel:
Now : 20:56:14 running Linux
2.4.12-ac5+acct-entropy+preempt+netdev-ramdom+vm-free-swapcache

Btw, this was on a read only NTFS partition. I can test with ext3 if
needed...
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