Re: 2 of 16 cores are constantly maxing out - how to balance the load?

So, let’s say say you have 8 cores and 1 RX and 1 TX queue: Core 0: RX queue Core 1: TX queue Core 2 to 7: nginx processes what tool or configuration file would I have to use to dedicate cores to processes? ___ nginx mailing list nginx@nginx.org

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

Perhaps you should use pidstat to validate which processes are running on the two busy cores? Did that an can confirm that CPU 5 and 6 are not exclusively used by networking - but also by nginx and php-fpm. ___ nginx mailing list nginx@nginx.org

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

Perhaps you should use pidstat to validate which processes are running on the two busy cores? > On Jan 11, 2018, at 6:25 AM, Vlad K. wrote: > > On 2018-01-11 11:59, Lucas Rolff wrote: >> Now, in your case with php-fpm in the mix as well, controlling that >> can be

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

On 2018-01-11 11:59, Lucas Rolff wrote: Now, in your case with php-fpm in the mix as well, controlling that can be hard ( not sure if you can pin php-fpm processes to cores ) – but for nginx and RX/TX queues, it’s for sure possible. Should be doable with cgroups / cpusets? CPUAffinity

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

In high traffic environments it generally make sense to “dedicate” a core to each RX and TX queue you have on the NIC – this way you lower the chances of a single core being overloaded from handling network and thus degrading performance. And then at same time within nginx, map the individual

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

Or would it make sense (if possible at all) to assign two or three more cores to networking interrupts? ___ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx

Re: 2 of 16 cores are constantly maxing out - how to balance the load?

If it’s the same two cores, it might be another process that uses the same two cores and thus happens to max out. One very likely possibility would be interrupts from e.g. networking. You can check /proc/interrupts to see where interrupts from the network happens. From: nginx

2 of 16 cores are constantly maxing out - how to balance the load?

Hello! I have nginx with php-fpm running on a 16 core Ubuntu 16.04 instance. The server is handling more than 10 million requests per hour. https://imgur.com/a/iRZ7V As you can see on the htop screenshot cores 6 and 7 are maxed out and that's the case constantly - even after restarting nginx