93 lines
2.2 KiB
Groff
93 lines
2.2 KiB
Groff
.TH nohang 1
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.SH NAME
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nohang \- A highly configurable OOM preventer
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.SH SYNOPSIS
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.B nohang
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.RB [ OPTION ]...
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.SH DESCRIPTION
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Nohang is a highly configurable daemon for Linux which is able to correctly prevent out of memory (OOM) and keep system responsiveness in low memory conditions.
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.SH REQUIREMENTS
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.B For basic usage:
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- Linux 3.14+ (since MemAvailable appeared in /proc/meminfo)
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- Python 3.3+ (not tested with previous)
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.B To show GUI notifications:
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- Notification server (most of desktop environments use their own implementations)
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- libnotify (Fedora, Arch Linux) or libnotify-bin (Debian GNU/Linux, Ubuntu)
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- sudo if nohang started with UID=0
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.B To use PSI:
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- Linux 4.20+
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.SH OPTIONS
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-h, --help show this help message and exit
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-v, --version print version
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-p, --print-proc-table
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print table of processes with their badness values
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-c CONFIG, --config CONFIG
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path to the config file, default values:
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./nohang.conf, /etc/nohang/nohang.conf
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.SH HOW TO CONFIGURE
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The program can be configured by editing the config file.
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.B The configuration includes the following sections:
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- Memory levels to respond to as an OOM threat
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- Response on PSI memory metrics
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- The frequency of checking the level of available memory (and CPU usage)
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- The prevention of killing innocent victims
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- Impact on the badness of processes via matching their names, cmdlines and UIDs with regular expressions
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- The execution of a specific command or sending any signal instead of sending the SIGTERM signal
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- GUI notifications:
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- notifications of corrective actions taken
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- low memory warnings
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- Verbosity
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- Misc
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Just read the description of the parameters and edit the values.
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Please restart nohang to apply the changes.
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Default path to the config after installing is /etc/nohang/nohang.conf.
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.SH LOGGING
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To view the latest entries in the log (for systemd users):
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$ sudo journalctl -eu nohang
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See also man journalctl.
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You can also enable separate_log in the config to logging in /var/log/nohang/nohang.log.
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.SH SEE ALSO
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https://github.com/hakavlad/nohang
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