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From
SubjectRe: Going from 32M to 48M, Linux crawls!
Date
"Kayvan Sylvan writes"
|>
|> Hi folks,
|>
|> I just put another 72pin 16Meg SIMM into my machine (memory prices are
|> rock bottom right now).
|>
|> When I rebooted, Linux (1.99.9) was dog slow!!! Does anyone have any
|> ideas?
|>
|> I swapped memory chips around, tested memory, everything else I could
|> think of, but putting in the extra RAM slowed down my machine. The
|> chips themselves are fine.
|>
|> I then booted linux with mem=16M and it was fast, and with mem=32M
|> (the amount I used to have) and it was also fast. Since I haven't
|> uninstalled the hardware, I'm assuming this is a software problem. I'm
|> running with 32M (even though I have 48M installed).
|>
|> Has anyone seen this before? Please, please, please, someone tell me
|> there's a patch! ;-)
|>
|> ---Kayvan

Looks like your cache won't work with the extra 16 MB. Depending on the
kernel's memory mapping strategy, the code which is accessed most, is
now located in un-cached memory, so your system _must_ crawl.

Try changing your CMOS settings / adding more cache.

Steffen
--
Steffen Grunewald | email steffen@gfz-potsdam.de | fax (+49)-331-8877 520
GeoForschungsZentrum Potsdam, Telegrafenberg A17, D-14473 Potsdam, Germany
/* Disclaimer : I don't speak for my employers, they don't speak for me */


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