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memory usage

Wow Jerry! Now I just have to digest all this new info. Thanks again.


At 12:05 PM 5/2/02 -0400, Jerry Feldman wrote:
>I explained buffers in my previous email.
>Memory itself is chunked into pages (page size depends on the OS, hardware,
>etc.). Pages in physical can be in several different states(generally):
>1. unused or free.
>2. used - clean - means that they don't need to be paged out.
>3. used - dirty - means that if the VM needs to used that page, it needs to
>be swapped out to the paging area (eg. swap),
>4. wired - cannot be paged out or reused. The OS will wire a page for
>several purposes. When an I/O is in progress, a page may be temporarily
>wired. The OS may permanently wire some pages for its own use.

Drew Taylor                     JA[P|m_p]H      Just Another Perl|mod_perl Hacker
mailto:drew at      *** God bless America! ***
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