On Feb 17, 2017 2:52 PM, "William A Rowe Jr" <wr...@rowe-clan.net> wrote:
On Feb 17, 2017 1:02 PM, "Jacob Champion" <champio...@gmail.com> 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. (With traditional and sendfile, you still have copy once on read - even if that file is sitting in FS cache.)
