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Full Discussion: Bash script to periodically monitor a process's memory usage
Top Forums Shell Programming and Scripting Bash script to periodically monitor a process's memory usage Post 303045286 by james101 on Sunday 15th of March 2020 03:08:16 PM
Old 03-15-2020
Bash script to periodically monitor a process's memory usage
I'm looking for a bash script that allows me to start a process in background, monitor its memory consumption every 10 minutes for example, and if it exceeds a certain value kill it and restart it.
Some idea?
I'm new to bash programming, I started writing a script and after testing it I always get the same error,
Code:
syntax error near unexpected token 'fi'

how to proceed? I run the code on an ec2 aws istance


Code:
    #note that this code is incomplete while loop missing
    #!/usr/bin/bash
    sudo python3 main.py &
    pidlist=$(pidof python3 main.py)
    read FIRST __ <<< "$pidlist"
    echo "$FIRST"
    #memory in percent
    mem=$(ps -p "$FIRST" -o %mem)
    echo "$mem"
    set -- $mem
    memory="$2"
    if [ "$memory" -gt "20.0" ];then
      echo "killing process"
    fi

Last edited by james101; 03-16-2020 at 01:59 PM..
 

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LEARN ABOUT MINIX

dh_systemd_start

DH_SYSTEMD_START(1)						     Debhelper						       DH_SYSTEMD_START(1)

NAME

       dh_systemd_start - start/stop/restart systemd unit files

SYNOPSIS

       dh_systemd_start [debhelperoptions] [--restart-after-upgrade] [--no-stop-on-upgrade] [unitfile...]

DESCRIPTION

       dh_systemd_start is a debhelper program that is responsible for starting/stopping or restarting systemd unit files in case no corresponding
       sysv init script is available.

       As with dh_installinit, the unit file is stopped before upgrades and started afterwards (unless --restart-after-upgrade is specified, in
       which case it will only be restarted after the upgrade).  This logic is not used when there is a corresponding SysV init script because
       invoke-rc.d performs the stop/start/restart in that case.

OPTIONS

       --restart-after-upgrade
	   Do not stop the unit file until after the package upgrade has been completed.  This is the default behaviour in compat 10.

	   In earlier compat levels the default was to stop the unit file in the prerm, and start it again in the postinst.

	   This can be useful for daemons that should not have a possibly long downtime during upgrade. But you should make sure that the daemon
	   will not get confused by the package being upgraded while it's running before using this option.

       --no-restart-after-upgrade
	   Undo a previous --restart-after-upgrade (or the default of compat 10).  If no other options are given, this will cause the service to
	   be stopped in the prerm script and started again in the postinst script.

       -r, --no-stop-on-upgrade, --no-restart-on-upgrade
	   Do not stop service on upgrade.

       --no-start
	   Do not start the unit file after upgrades and after initial installation (the latter is only relevant for services without a
	   corresponding init script).

NOTES

       Note that this command is not idempotent. dh_prep(1) should be called between invocations of this command (with the same arguments).
       Otherwise, it may cause multiple instances of the same text to be added to maintainer scripts.

       Note that dh_systemd_start should be run after dh_installinit so that it can detect corresponding SysV init scripts. The default sequence
       in dh does the right thing, this note is only relevant when you are calling dh_systemd_start manually.

SEE ALSO

       debhelper(7)

AUTHORS

       pkg-systemd-maintainers@lists.alioth.debian.org

11.1.6ubuntu2							    2018-05-10						       DH_SYSTEMD_START(1)
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