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Chapter 60. Servers and Services
Rsyslog cannot proceed if the default maximum of open files is exceeded
Rsyslog sometimes runs over the default limits for maximum number of open files. Consequently, rsyslog cannot open new files.
To work around this problem, modify the rsyslog configuration by increasing this limit to align with systemd-journald. To do so, create a drop-in file named
/etc/systemd/system/rsyslog.service.d/increase_nofile_limit.conf with the following content:
[Service] LimitNOFILE=16384
(BZ#1553700)
Tuned does not set kernel boot command line parameters
The
Tuned tool does not support Boot Loader Specification (BLS), which is enabled by default. Consequently, Tuned does not set certain kernel boot command line parameters, which causes some issues, such as performance decrease or CPU cores not being isolated. To work around this problem, disable BLS and restart Tuned.
1. Install the grubby package.
2. Remove the following line from the
/etc/default/grub file:
GRUB_ENABLE_BLSCFG=true
3. Re-generate the
grub2.cfg file by running for non-EFI systems:
grub2-mkconfig -o /etc/grub2.cfg
or for EFI systems:
grub2-mkconfig -o /etc/grub2-efi.cfg
4. Restart
Tuned by running:
systemctl restart tuned
As a result,
Tuned sets the kernel boot parameters as expected. (BZ#1576435)
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