Hey Paride, sorry for the confusion and not making this clear: the System is latest LTS, 22.04, jammy with PHP7.4 packages from https://launchpad.net/~ondrej/+archive/ubuntu/php I suppose the issue is with PHP, yes, because: We have several other jammy machines with other projects running PHP 5.6 from ondrej with no issues. We had one other jammy machine with another project running PHP 7.4 from ondrej and we had these issues with MPM worker, too. We switched that server to event and the issue disappeared. But the traffic on that other server is much much less. So I guess this might be related to ondrey's PHP 7.4 packages. > - If you disable logrotate, do you ever get apache2 processes stuck in "Sending Reply" state? Nope. Without "graceful" there a never stuck apache2 processes. Only when a reload is triggered some processes don't get killed and become "old gen" and stuck. - My gut feeling is that PHP may be involved in this. Are you able to try to reproduce the issue with a different PHP version from https://launchpad.net/~ondrej/+archive/ubuntu/php ? We have jammy with ondrej PHP 7.4 and jammy with ondrej PHP 5.6, but only the 7.4 machines receive more than a little bit of traffic, nettolohn.de (where we see this issue) having a lot/moderate amount of traffic. % apt-cache policy Package files: 100 /var/lib/dpkg/status release a=now 500 https://dl.yarnpkg.com/debian stable/main all Packages release o=yarn,a=stable,n=stable,l=yarn-stable,c=main,b=all origin dl.yarnpkg.com 500 https://dl.yarnpkg.com/debian stable/main amd64 Packages release o=yarn,a=stable,n=stable,l=yarn-stable,c=main,b=amd64 origin dl.yarnpkg.com 500 https://ppa.launchpadcontent.net/ondrej/php/ubuntu jammy/main amd64 Packages release v=22.04,o=LP-PPA-ondrej-php,a=jammy,n=jammy,l=***** The main PPA for supported PHP versions with many PECL extensions *****,c=main,b=amd64 origin ppa.launchpadcontent.net 500 https://deb.nodesource.com/node_16.x jammy/main amd64 Packages release o=Node Source,n=jammy,l=Node Source,c=main,b=amd64 origin deb.nodesource.com 500 http://security.ubuntu.com/ubuntu jammy-security/multiverse amd64 Packages release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=multiverse,b=amd64 origin security.ubuntu.com 500 http://security.ubuntu.com/ubuntu jammy-security/universe amd64 Packages release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=universe,b=amd64 origin security.ubuntu.com 500 http://security.ubuntu.com/ubuntu jammy-security/restricted amd64 Packages release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=restricted,b=amd64 origin security.ubuntu.com 500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages release v=22.04,o=Ubuntu,a=jammy-security,n=jammy,l=Ubuntu,c=main,b=amd64 origin security.ubuntu.com 100 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-backports/universe amd64 Packages release v=22.04,o=Ubuntu,a=jammy-backports,n=jammy,l=Ubuntu,c=universe,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 100 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-backports/main amd64 Packages release v=22.04,o=Ubuntu,a=jammy-backports,n=jammy,l=Ubuntu,c=main,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/multiverse amd64 Packages release v=22.04,o=Ubuntu,a=jammy-updates,n=jammy,l=Ubuntu,c=multiverse,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 Packages release v=22.04,o=Ubuntu,a=jammy-updates,n=jammy,l=Ubuntu,c=universe,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/restricted amd64 Packages release v=22.04,o=Ubuntu,a=jammy-updates,n=jammy,l=Ubuntu,c=restricted,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages release v=22.04,o=Ubuntu,a=jammy-updates,n=jammy,l=Ubuntu,c=main,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy/multiverse amd64 Packages release v=22.04,o=Ubuntu,a=jammy,n=jammy,l=Ubuntu,c=multiverse,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy/universe amd64 Packages release v=22.04,o=Ubuntu,a=jammy,n=jammy,l=Ubuntu,c=universe,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy/restricted amd64 Packages release v=22.04,o=Ubuntu,a=jammy,n=jammy,l=Ubuntu,c=restricted,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com 500 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu jammy/main amd64 Packages release v=22.04,o=Ubuntu,a=jammy,n=jammy,l=Ubuntu,c=main,b=amd64 origin eu-central-1.ec2.archive.ubuntu.com Pinned packages: