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From William A Rowe Jr <>
Subject Re: httpd 2.4.25, mpm_event, ssl: segfaults
Date Fri, 17 Feb 2017 20:52:21 GMT
On Feb 17, 2017 1:02 PM, "Jacob Champion" <> wrote:

`EnableMMAP on` appears to boost performance for static files, yes, but is
that because of mmap() itself, or because our bucket brigades configure
themselves more optimally in the mmap() code path? Yann's research is
starting to point towards the latter IMO.

This may be as simple as the page manager caching and reusing the
un-cleared page mapping on subsequent hits. You would need to
overwhelmingly vary the page content served to test this theory. But the
same caching wins for libld[l] ... Which doesn't segv during os updates.
Probably due to copy-on-write mechanics.

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