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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. live past the return from the function and can reside on the stack.
</p> </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> <h2 id="Concurrency">Concurrency</h2>
<h3 id="What_operations_are_atomic_What_about_mutexes"> <h3 id="What_operations_are_atomic_What_about_mutexes">