Increase file descriptor limit via systemd service file #345
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Default file limit value set by systemd can be found: systemctl show --property DefaultLimitNOFILESoft
DefaultLimitNOFILESoft=1024
This limit could easily be exceeded on larger systems resulting in:
Starting irqbalance Can't open class file: : Too many open files
startproc: signal catched /usr/sbin/irqbalance: Segmentation fault
Adding the property to irqbalance.service.in sets a sane default and allows people to easily find the right place where to adjust the limit.