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doc/faq: discuss virtual memory use by go processes

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Fixes #3948.

R=golang-dev, r, dave, dsymonds
CC=golang-dev
https://golang.org/cl/6639064
This commit is contained in:
Andrew Gerrand 2012-10-11 14:21:19 +11:00
parent dad1228cc3
commit 2100947d4a
1 changed files with 16 additions and 0 deletions
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doc/go_faq.html
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@ -1099,6 +1099,22 @@ analysis</em> recognizes some cases when such variables will not
live past the return from the function and can reside on the stack.
</p>
<h3 id="Why_does_my_Go_process_use_so_much_virtual_memory">
Why does my Go process use so much virtual memory?</h3>
<p>
The Go memory allocator reserves a large region of virtual memory as an arena
for allocations. This virtual memory is local to the specific Go process; the
reservation does not deprive other processes of memory.
</p>
<p>
To find the amount of actual memory allocated to a Go process, use the Unix
<code>top</code> command and consult the <code>RES</code> (Linux) or
<code>RSIZE</code> (Mac OS X) columns.
<!-- TODO(adg): find out how this works on Windows -->
</p>
<h2 id="Concurrency">Concurrency</h2>
<h3 id="What_operations_are_atomic_What_about_mutexes">