On Thu, 8 Aug 2019 10:36:13 +0200 (CEST) Sammy Atmadja wrote: > > > > > > > /etc/init.d/squid increases the open file limit (ulimit -n 65535) > > > > > > from the default value of 1024. This does not happen when squid > > > > > > is started from systemd, resulting on busy systems in the > > > > > > following errors in /var/log/squid/cache.log : > > > > > > > > > > > > 2019/08/08 09:59:19 kid1| WARNING! Your cache is running out of > filedescriptors > > > > >
These are not exactly equivalents. The sysvinit default is to have a rather low FD limitation which prevents squid.conf being able to set max_filedescriptors to useful higher values. ulimit is used in that script as a workaround to raise that limit higher - but it is still an explicit upper limit. Under systemd the default is not to have any limitation at all. So squid.conf can raise as high as the admin wants, _except_ when that limit is set. When there is a fixed upper limit Squid auto-detects and uses that. Unfortunately there are still some bugs that needs to be straightened out upstream for Squid to use the --with-filedescriptors value when there is *no* specific upper limit provided by the OS. The first of those fixes is in the pending 4.8 packages. Two more to follow at a later date (no ETA sorry). Amos
