Hello! On Wed, Mar 20, 2019 at 06:41:01PM -0400, wkbrad wrote:
[...] > The first test I ran was in FreeBSD just because I was curious. Lol. But I > actually saw the exact same problem on it. I can send you some tests if you > like but they look the same as the others do. On FreeBSD you'll see that _virtual_ memory usage grows on reload, but the actual memory is returned to the system and can be used by other processes. [...] > Notice it starts up using more memory than before but it now does not double > it's ram usage after a reload. I can deal with that but I'm still curious > if you know why it's now using more ram. Any thoughts on that? This is because mmap()-based individual allocations imply additional overhead. Using mmapAnd this is are costly. > > But when I bring this setup to one of my live servers the effect isn't quite > the same. Here is a test from it with the same settings in systemd. > -------------------------------------------------------------------------------- > [root@live ~]# systemctl restart nginx; sleep 60; ps_mem |egrep 'RAM|nginx' > Private + Shared = RAM used Program > 21.6 MiB + 1.4 GiB = 1.5 GiB nginx (3) > [root@live ~]# systemctl reload nginx; sleep 60; ps_mem |egrep 'RAM|nginx' > Private + Shared = RAM used Program > 21.9 MiB + 2.3 GiB = 2.4 GiB nginx (3) > -------------------------------------------------------------------------------- > > So that's definitely better but still not like the test environment. I'm > sure part of the difference is that this server has real traffic and is > somewhat busy. And it's using caching and probably has different buffer > settings and such. So that may explain why there is an increase. But it's > still very perplexing. > > What are your thoughts on all of that? > > And thank you again for all of the help! > > Posted at Nginx Forum: > https://forum.nginx.org/read.php?2,283216,283448#msg-283448 > > _______________________________________________ > nginx mailing list > nginx@nginx.org > http://mailman.nginx.org/mailman/listinfo/nginx -- Maxim Dounin http://mdounin.ru/ _______________________________________________ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx
