Inside the system: resources, kernel, processes

Quiz: limits and kernel parameters

Question 1 of 10

The open-file limit of a process and a service, soft and hard limits, LimitNOFILE in a drop-in, sysctl and /etc/sysctl.d, wa in vmstat, iostat, pidstat and ionice. The questions follow the lessons “ulimit and sysctl: system ceilings” and “Who loads the disk”.

10 questions · threshold 70%

Read the output

A service writes Too many open files to its log. How many files can its process keep open?

$ ulimit -n
1024
$ grep 'open files' /proc/$(pgrep -x shipper)/limits
Max open files            64                   64                   files

1024 — the same as the shell.
64.
Unlimited — root started the service.
128 — soft and hard together.

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