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New FAQ entry about available free memory. Provided by John Dyson

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PR:		docs/38118
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Murray Stokely 2003-05-05 04:18:20 +00:00
parent c2f098f25f
commit 5a47de5057
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=16798
1 changed files with 23 additions and 1 deletions
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en_US.ISO8859-1/books/faq/book.sgml
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@ -7282,7 +7282,7 @@ define(`confDELIVERY_MODE',`deferred')dnl</programlisting>
<para>What do the various memory states displayed by
<command>top</command> mean?</para>
</question>
<!-- Provided by John Dyson via Usenet -->
<answer>
<itemizedlist>
<listitem><para><literal>Active</literal>: pages recently
@ -7337,6 +7337,28 @@ define(`confDELIVERY_MODE',`deferred')dnl</programlisting>
described.</para>
</answer>
</qandaentry>
<qandaentry>
<question id="free-memory-amount">
<para>How much free memory is available</para>
</question>
<!-- Provided by John Dyson via Usenet -->
<answer>
<para>There are a couple of kinds of <quote>free
memory</quote>. One kind is the amount of memory
immediately available without paging anything else out.
That is approximately the size of cache queue + size of
free queue (with a derating factor, depending upon system
tuning.) Another kind of <quote>free memory</quote> is
the total amount of <acronym>VM</acronym> space. That can
be complex, but is dependent upon the amount of swap space
and memory. Other kinds of <quote>free memory</quote>
descriptions are also possible, but it is relatively
useless to define these, but rather it is important to
make sure that the paging rate is kept low, and to avoid
running out of swap space.</para>
</answer>
</qandaentry>
</qandaset>
</chapter>