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30 lines
1.1 KiB
Markdown
30 lines
1.1 KiB
Markdown
# ionice
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> Get or set program I/O scheduling class and priority.
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> Scheduling classes: 1 (realtime), 2 (best-effort), 3 (idle).
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> Priority levels: 0 (the highest) - 7 (the lowest).
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> More information: <https://manned.org/ionice>.
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- Run a command with the given scheduling class and priority:
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`ionice {{[-c|--class]}} {{scheduling_class}} {{[-n|--classdata]}} {{priority}} {{command}}`
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- Set I/O scheduling class of a running process with a specific [p]id, [P]gid or [u]id:
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`ionice {{[-c|--class]}} {{scheduling_class}} -{{p|P|u}} {{id}}`
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- Run a command with custom I/O scheduling class and priority:
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`ionice {{[-c|--class]}} {{scheduling_class}} {{[-n|--classdata]}} {{priority}} {{command}}`
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- Ignore failure to set the requested priority:
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`ionice {{[-t|--ignore]}} {{[-n|--classdata]}} {{priority}} {{[-p|--pid]}} {{pid}}`
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- Run the command even in case it was not possible to set the desired priority (this can happen due to insufficient privileges or an old kernel version):
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`ionice {{[-t|--ignore]}} {{[-n|--classdata]}} {{priority}} {{[-p|--pid]}} {{pid}}`
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- Print the I/O scheduling class and priority of a running process:
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`ionice {{[-p|--pid]}} {{pid}}`
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